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Rare birds in the Netherlands in 2010

Arjan Ovaa, Dick Groenendijk, Max Berlijn & CDNA

This is the 31st annual report on rare birds in the Netherlands to be published in Dutch Birding. This report comprises records from 2010 as well as belated and reconsidered records, dating back to 1977, which have been evaluated by the Dutch rarities committee, the Commissie Dwaalgasten Nederlandse Avifauna (CDNA). Several 2010 reports are still under review or awaiting submission and could therefore not be included. In addition, some reports for 2009 and earlier years are still under consideration for various reasons. The increase in entering records online on internet portals like produces many new details of past records. In this report, therefore, date extensions are presented, for the sake of completeness.
Details included for each record are, if available: date(s); location and/or municipality (municipal divisions as on 1 January 2010); province; number of birds if more than one, plumage and sex; type of record if trapped, photographed, sound-recorded, videoed or found dead (and where specimen is stored); names of up to three observers involved in finding, identifying and recording, and relevant references in the literature, which normally include (inter)national but not regional journals, and published photographs. Records from 2009 lasting into 2010 that already have been published in the 2009 report (Ovaa et al 2010) are repeated here without reference, for the sake of completeness.

Observations not (yet) submitted but mentioned in the 2009 report are not repeated in this report. The sequence of the records in the species accounts is from the current year backwards, with records within one year presented chronologically. A compilation of most rarities videoed can be found in Plomp (2011). Numbers after each (sub)species' name refer to the total number of individuals 1 from 1 January 1800 to 31 December 1979, 2 since 1 January 1980 but excluding 3 the current year. Taxa marked with an asterisk * are new to the Dutch list.

The following CDNA members voted on some or all of the records in this report: Rob S A van Bemmelen, Dick Groenendijk (chairman), Frank Neijts, Arjan Ovaa, Willem van Rijswijk (secretary), Roy Slaterus, Laurens B Steijn, Arend Was­sink and Rik Winters. Max Berlijn supported the committee as non-voting archivist and assisted in submitting reports published on national and regional websites. Reports can be submitted through e-mail ( via the CDNA page on, using an electronic submission form. Furthermore, submitting is also facilitated by filling in this form after entering a report on Reports can also be sent by ordinary mail to CDNA, Duinlustparkweg 98A, 2082 EG Santpoort-Zuid, the Netherlands, preferably using standard forms which can be obtained free of charge from CDNA. On the Dutch Birding website, information is shown of either recently accepted records or rejected reports as well as records and reports currently under review.

Decisions regarding taxonomy have been delegated to the Dutch committee for avian systematics (Commissie Systematiek Nederlandse Avifauna; CSNA), which on 1 January 2010 consisted of the following members: Arnoud B van den Berg, André J van Loon, C S (Kees) Roselaar and George Sangster (secretary).

In 2010, at least 367 species were recorded, which is well above the average of 362 species a year for the last 10 years. The number may rise to 370 or more depending on the acceptance of several pending reports (ie, Semipalmated Sandpiper Calidris pusilla, Greater Short-toed Lark Calandrella brachydactyla, Subalpine Warbler Sylvia cantillans and Arctic Redpoll Carduelis hornemanni). Two were new to the Dutch list: Grey-tailed Tattler Tringa brevipes and Northern Waterthrush Parkesia noveboracensis. The Oriental Turtle Dove Streptopelia orientalis from 23 December 2009 to 3 April 2010 was also a new species but this bird was found in 2009. With these three additions, the Dutch list now numbers 501 species (including Cabot's Tern Sterna acuflavida, which was upgraded to species level; Redactie Dutch Birding 2011). Other highlights for 2010 included the second Wallcreeper Tichodroma muraria, third Demoiselle Crane Grus virgo and Blue-cheeked Bee-eater Merops persicus, fourth Greater Yellow­legs Tringa melanoleuca, fifth Pygmy Cormorant Phalacrocorax pygmeus and Black-winged Kite Elanus caeruleus, seventh Long-legged Buzzard Buteo rufinus and Daurian Shrike Lanius isabellinus, and ninth White-tailed Lapwing Vanellus leucurus and Eurasian Scops Owl Otus scops. In addition, 2010 was a good year for Ring-necked Duck Aythya collaris, Pallid Harrier Circus macrourus and River Warbler Locustella fluviatilis with each three records, Short-toed Snake Eagle Circaetus gallicus, Buff-breasted Sandpiper Tryngites ruficollis, Iberian Chiffchaff Phylloscopus ibericus, Red-flanked Bluetail Tarsiger cyanurus, Desert Wheatear Oenanthe deserti and Citrine Wagtail Motacilla citreola with four, and Thrush Nightingale Luscinia luscinia with five.

Systematic list of records

Ross's Goose / Ross' Gans
Anser rossii 0,12,0
7-15 February, Wieringermeer, Noord-Holland, adult, white morph, photographed (B Woets et al); 9 February, Polder Mosselhoek, Tholen, Zeeland, two, adults, white morph, photographed (S Lilipaly, P A Wolf); 2-4 March, Middelburg, Zeeland, adult, white morph, photographed (H Peterse, H Huige, M Klootwijk et al).
These birds are considered to be the same individuals seen earlier during the winter of 2009/10, having split from the group of four which stayed on Texel, Noord-Holland, from 28 September 2009 onwards (Ovaa et al 2010). Not all reports in 2010 have (yet) been submitted and, therefore, observers are asked to submit additional information to complete our understanding about the movements of these birds.

Ring-necked Duck / Ringsnaveleend
Aythya collaris 5,26,3
4-10 April, Lepelaarplassen, Almere, Flevoland, adult male, photographed, videoed (B van 't Holt, F van Schaik, K Das et al); 11 April to 11 May, Dijkwielen and Waterpark Oude Zeug, Wieringermeer, Noord-Holland, adult male, photographed (P Baalbergen et al; Dutch Birding 32: 217, plate 290, 2010); 25 April to 3 May, Philipsdam, Schouwen-Duiveland, Zeeland, adult male, photographed (N D van Swelm, D de Boer et al).

Ring-necked x Tufted Duck / Ringsnaveleend x Kuifeend
Aythya collaris x fuligula 0,8,0
11-23 April, Dijkwielen and Waterpark Oude Zeug, Wieringermeer, Noord-Holland, male, photographed (F Visscher et al; Dutch Birding 32: 217, plate 289, 2010); 15 April and 31 October to 30 April 2011, Natuurplas Breeveld, Woerden, Utrecht, adult male, photographed (M Eising, P van der Werken et al).
2009 29 November 2008 to 12 April, Dijkwielen and Waterpark Oude Zeug, Wieringermeer, Noord-Holland, male, photographed (J Buijsman et al).
2008 8 March and 29 November to 12 April 2009, Dijkwielen and Waterpark Oude Zeug, Wieringermeer, Noord-Holland, male, photographed (P M A van der Wielen et al).
2005 25 December, Dijkwielen, Wieringermeer, Noord-Holland, male (B Woets) (cf Dutch Birding 30: 388, 2010).
The individual at Woerden is considered a returning bird, already accepted for the winter of 2007/08 (Ovaa et al 2009). The returning bird at Wieringermeer was first accepted for 26 December 2003 to 2 March 2004 (van der Vliet et al 2006).

Lesser Scaup / Kleine Topper
Aythya affinis 0,8,0
4-10 March and 1 April to 15 May, Waterpark Oude Zeug, Wieringermeer, Noord-Holland, adult male, photo­graphed (F Visscher et al; Dutch Birding 32: 219, plate 295, 2010).
This bird is considered one of the two males seen at the same site in the spring of 2009 (Ovaa et al 2010).

White-headed Duck / Witkopeend
Oxyura leucocephala 5,10,2
10-12 February, Dobbeplas, Pijnacker-Nootdorp, Zuid-Holland, female, photographed (A Joon et al; Birding World 23: 57, 2010), and 13-15 February, Zeven­huizer­plas, Rotterdam, Zuid-Holland, female, photographed (Dutch Birding 32: 146, plate 187, 2010), and 20 February to 19 March, Vogelplas Starrevaart, Leid­schendam-Voorburg, maximum of two (two from 27 Febru­ary to 9 March), females, photographed (S Schil­peroort et al; Dutch Birding 32: 146, plate 185, 2010) and 24 March to 2 April, two, females, and 6-9 April, Bleeke Heide, Chaam, Noord-Brabant, female (C Jans­sen, E Corssmit, M Bijl-Lips et al), and 5-9 April, Lepe­laar­plassen, Almere, Flevoland, female, photographed (K Das et al), and 5 April, Vogelplas Starrevaart, Leid­schendam-Voorburg, Zuid-Holland, female, photographed, videoed (S Schilperoort).
There were at least two widely roaming individuals which were staying most of the time with a group of c 20 Ruddy Ducks O jamaicensis near Leidschendam. These individuals were the first since 2007 and the first twitchable since 2003. All previous records were between 7 November and 6 April.

King Eider / Koningseider
Somateria spectabilis 1,12,0
1994 24 October to 26 November, Scheveningen, Den Haag, Zuid-Holland, first-winter female, photographed.
This concerns a date extension of a bird previously accepted for 24 October to 12 November (Wiegant et al 1996).

Surf Scoter / Brilzee-eend
Melanitta perspicillata 3,22,1
17 April and 24 April to 2 June, Horsmeertjes and Mokbaai, Texel, Noord-Holland, adult male, photographed, videoed (E van Abs, A van Abs-Knigge et al; Dutch Birding 32: 215, plate 288, 219, plate 297, 2010); 18-20 April, Brouwersdam, Schouwen-Duiveland, Zeeland, and Goedereede, Zuid-Holland, female, photo­graphed (H Verdaat, P A Wolf, G Tanis et al).
2005 6-15 April, Brouwersdam, Schouwen-Duiveland, Zeeland, adult male (E de Bruin, R van Dijk).
The adult male on Texel is considered the same individual as the one c 20 km north at Slufter, Texel, on 10 May 2009 (cf Ovaa et al 2010). Both times, it was actively displaying to female Common Eiders Somateria mollissima. The record from 2005 concerns a date extension of a bird previously accepted for 6-11 April 2005 (van der Vliet et al 2006).

Bufflehead / Buffelkopeend
Bucephala albeola 0,2,0
17 October 2009 intermittently to 1 June and 9 October to 14 May 2011, Gaatkensplas and surroundings, Baren­drecht, Zuid-Holland, and 10-15 January, Zuid-Maartens­gat, Dordtsche Biesbosch, Dordrecht, Zuid-Holland, adult male, photographed (Dutch Birding 33: 148, plate 162, 2011).
2005 2-18 May, Ezumakeeg, Dongeradeel, Friesland, first-winter male, photographed (R Cazemier, J Bosch et al; Dutch Birding 27: 214, plate 258, 2005).
During a cold spell in January, the Barendrecht bird (staying for its seventh consecutive winter) was present at Dordtsche Biesbosch, c 15 km from its usual but frozen site of Gaatkensplas. The 2005 bird had already been accepted (van der Vliet et al 2007) but has been reconsidered and is now accepted as a different individual, based on comparison of photographs.

Hooded Merganser / Kokardezaagbek
Lophodytes cucullatus 0,0,0
The CDNA is still discussing the status of a few individuals of which video footage and/or photographs left no doubt that they wore no ring. It is expected that conclusions about their status will be published in the next report.

Falcated Duck / Bronskopeend
Anas falcata 0,10,0
1996 16 November to 28 December, Amsterdamse Water­leidingduinen, Bloemendaal, Noord-Holland, male.
This is a date extension of a returning bird first seen in January 1992 and previously accepted until 22 Decem­ber 1996 (van den Berg & Bosman 2001, Berlijn 2007). The bird was absent in the winter of 1995/96 and present again from 16 November 1996 (cf van der Vliet et al 2000, contra Berlijn 2007).

American Wigeon / Amerikaanse Smient
Anas americana 5,55,1
7 February, Natuurplas Breeveld, Woerden, Utrecht, adult male, photographed (J de Bruijn, N van Duivendijk et al).
2007 23-28 October, Hollum, Ameland, Friesland, adult male, photographed (R Wantia).
2001 18 November 2000 to 3 March, Ouderkerkerplas, Ouder-Amstel, Noord-Holland, adult male, photographed, videoed (T J C Luijendijk, A Vink et al).
2000 18 November to 3 March 2001, Ouderkerkerplas, Ouder-Amstel, Noord-Holland, adult male (G Bakker, H van Oosterhout, A Vink et al).
1999 3 and 5 January, Weurt, Beuningen, Gelderland, adult male (P Hoppenbrouwers).
1997 15 February to 25 March, Aalkeet-Buitenpolder, Vlaardingen, Zuid-Holland, adult male, photographed (H Tetteroo, P L Meininger)
The reports for 1997, 1999 and 2007 concern date extensions of birds previously accepted for 15 February to 15 March 1997 (Wiegant et al 1999), 3 January 1999 (van der Vliet et al 2000) and 23-27 October 2007 (Ovaa et al 2008), respectively. The male in the winter of 2000/01 is considered to be a returning bird first present from 9 February to 9 March 2000 (van der Vliet et al 2001).

Baikal Teal / Siberische Taling
Anas formosa 8,1,0
A male reported from 29 January to 24 February and from 14 March to 23 April near Almelo, Overijssel (Dutch Birding 32: 180, plate 143, 2010), is still under consideration to establish its status.

Blue-winged Teal / Blauwvleugeltaling
Anas discors 6,29,1
22-23 June, Zaans Rietveld, Alphen aan den Rijn, Zuid-Holland, adult male, photographed (R Schonewille et al; Dutch Birding 32: 379, plate 381, 2010).
This Nearctic duck is most commonly found during spring: in April (10), May (10) and June (4).

Green-winged Teal / Amerikaanse Wintertaling
Anas carolinensis 6,46,1
29 April to 4 May, Brabantsche Biesbosch, Drimmelen, Noord-Brabant, male, photographed (B Verhoeven et al).
2009 9 October to 25 December 2008 and 4-8 April, Dijkmanshuizen, Ottersaat, Wagejot and Waal en Burg, Texel, male, photographed.
The 2009 record is a date extension of a bird previously accepted for 9 October to 25 December 2008 and (only) 4 April 2009 and not at Waal en Burg (Ovaa et al 2009).

Yellow-billed Loon / Geelsnavelduiker
Gavia adamsii 21,15,1
29 April, Doggersbank, Continentaal Plat, adult, summer plumage, photographed (H Verdaat, M Leopold, R Deke­ling; Dutch Birding 32: 218, plate 293, 2010).
1996 30 December 1995 to 28 January, Reeuwijkse Plassen, Reeuwijk, Zuid-Holland, first-winter (D Huitzing).
The bird seen at sea at Doggersbank was found from a vessel during a seabird survey and was the first since 2005. The 1995/96 record concerns a date extension of a bird previously accepted for 30 December 1995 to 20 January 1996 (Wiegant et al 1997).

Cory's/Scopoli's Shearwater / Kuhls/Scopoli's Pijlstorm­vogel
Calonectris borealis/diomedea 0,8,0
2006 5 November, Nes, Ameland, Friesland (J de Bruijn, H Lanters, S Bernardus et al).
This is a correction of a record wrongly mentioned for 2007 in Ovaa et al (2008). Apart from eight Calonectris shearwaters not identified to species, there have been five Cory's Shearwaters as well.

Great Shearwater / Grote Pijlstormvogel
Puffinus gravis 9,8,1
7 February, Waddijk, Sexbierum, Franekeradeel, tideline corpse, photographed, collected, skin retained at Neder­lands Centrum voor Biodiversiteit Naturalis, Leiden, Zuid-Holland (C Kuiken; Dutch Birding 32: 147, plate 188, 2010).

Pygmy Cormorant / Dwergaalscholver
Phalacrocorax pygmeus 0,4,1
9 May intermittently to 12 June, Ooijpolder, Ubbergen, and Lobith, Rijnwaarden, Gelderland, adult, summer plumage, photographed (P Verbeek et al; Ebels & Verbeek 2010; Birding World 23: 195, 2010, Dutch Birding 32: 227, plate 313-314, 2010).
There have been two birds in 1999 (January and June), one in May 2000 and one in March 2003. The one in 2010 stayed in a rather large and difficult-to-survey area of freshwater lakes surrounded by trees and could, therefore, be very elusive. Sometimes, it was not seen for many hours or even days despite extensive searching.

Squacco Heron / Ralreiger
Ardeola ralloides 25 (since 1866),52,2
17 June, Lelystad, Lelystad, Flevoland, photographed (R de Haas; Dutch Birding 32: 282, plate 391, 2010); 23 June, Polder Zuidbroek, Bergambacht, Zuid-Holland (V de Boer).
This species has been seen between 12 April and 30 October but more than half of all birds have been found in June.

Glossy Ibis / Zwarte Ibis
Plegadis falcinellus 116,63,-
1995 24-30 April, Willige Langerak, Lopik, Utrecht, photographed (A Boele, C Witkamp et al).
This is a date extension of a bird previously accepted for 25-30 April 1995 (van den Berg & Bosman 2001). This species is no longer considered since 1 January 2000 but the CDNA still welcomes reports from before this date.

Black-winged Kite / Grijze Wouw
Elanus caeruleus 1,3,1
7 April, Lindenholt, Nijmegen, Gelderland, photographed (E Jansen, F Sardar; Dutch Birding 32: 218, plate 292, 2010).
Two very lucky observers saw and photographed this bird while it passed their back garden in a southerly direction. There are four previous records: on 31 May 1971, on 29-31 March 1998, from 4 June to 23 August 2000, and on 22 May 2009.

Griffon Vulture / Vale Gier
Gyps fulvus 9,177,2
23 May, Gouda, Gouda, Zuid-Holland, photographed (N de Zwarte); 24 May, De Horde, Lopik, Utrecht, photo­graphed (A Boele, R Jansen; Dutch Birding 32: 279, plate 378, 2010).
It was decided to treat both sightings as two records although the distance between both was c 15-20 km, so it could easily have concerned the same individual.

Short-toed Snake Eagle / Slangenarend
Circaetus gallicus 3,46,4
26 May, Duinvliet, Overveen, Bloemendaal, Noord-Holland, photographed (C van Deursen); 17 July to 14 August, Fochteloërveen, Noordenveld, Drenthe/Oost­stellingwerf, Friesland, photographed (M Dijkster­huis et al); 18-29 July, Haaksbergerveen, Haaksbergen, Over­ijssel, photographed (B Hulsebos, B van Kuik et al); 1 August, Aekingerzand, Westerveld, Drenthe, photographed (M Jonker, W-J Fontijn).
A few reports are still circulating. The CDNA welcomes all reports not yet submitted to document the increase of records in recent years.

Pallid Harrier / Steppekiekendief
Circus macrourus 5,41,3
25 April, Rottumerplaat, Eemsmond, Groningen, second calendar-year, male, photographed (G Gerritsen, H Roers­ma, N van Brederode); 25 April, Ketelbrug, Dronten, Flevoland, second calendar-year, photographed (J Vree­man, T Janssen et al); 30 August, Alblasserwaard, Graaf­stroom, Zuid-Holland, second calendar-year, male, photo­graphed (A Clements, P Bieren, A Stip).
A well-watched juvenile in October at Petten, Noord-Holland (Dutch Birding 32: 427, plate 602, 2010), is still in circulation. Before 1999, only eight have been accepted and more than half were from the last five years. The CDNA welcomes all reports not yet submitted to document the increase of records in recent years.

Long-legged Buzzard / Arendbuizerd
Buteo rufinus 1,5,1
13 July, De Krim, De Cocksdorp, Texel, Noord-Holland, juvenile, photographed (N Baas; Dutch Birding 32: 353, plate 488-489, 2010).
This bird was found and photographed by a tourist in a holiday cottage park, resting on the chimney of one of the buildings. The photographs came to light days later, when the bird was no longer present. The possibility of Atlas Long-legged Buzzard B r cirtensis was considered, mainly because of the rather fine-looking bill, but the committee decided that the taxon involved could not be determined with certainty.

Demoiselle Crane / Jufferkraanvogel
Grus virgo 0,2,1
9 October, Meijendel, Wassenaar, and Westduinpark, Den Haag, photographed, and Maasvlakte, Rotterdam, and Brielsegatdam, Oostvoorne, Westvoorne, Zuid-Holland, first calendar-year (G Bakker, B Dijkstra, N Gregoire et al; Dutch Birding 32: 425, plate 599, 2010).
This immature was first seen in Zuid-Holland at 13:35, flying south-west along the coast at Meijendel, and during the next hour it passed three other migration watchpoints, flying past the last near Oostvoorne at 14:24. From the photographs, it was obvious that it did not wear any rings and that it was fully winged, so the CDNA decided that this individual could be of wild origin. The first was at Strabrechtse Heide and Groote Peel, Noord-Brabant, in four out of five spring periods in 1991-95; the second stayed near Buurse, Overijssel, on 15-26 August 2000.

Great Bustard / Grote Trap
Otis tarda -,25(since 1986),1
24 December, Groesbeek, Groesbeek, Gelderland, subadult male, photographed (J Jacobs), and 25 December, Hogerwaardpolder, Woensdrecht, Noord-Brabant, and Hogerwaardpolder, Kruiningen, Oostdijk, Rilland and Yerseke, Reimerswaal, Zeeland, subadult male, photographed, videoed (M Hoekstein, J Denee, E B Ebels et al; Ebels et al 2011; Dutch Birding 33: 65, plate 78, 72, plate 89-91, 2011).
The species has been considered by CDNA since 1986 and this was the first since 1997 - thanks to an early winter cold spell and heavy snow cover - and unexpectedly without any ring or wing clip from re-introduction projects. Careful comparison of the photographs left no doubt that all sightings involved a single individual, which covered a distance of c 120 km within 24 h. From 27 December to 4 March 2011, the same bird stayed intermittently near Denderbelle, Oost-Vlaanderen, Belgium (Dutch Birding 33: 139, plate 145-146, 2011).

Eurasian Stone-curlew / Griel
Burhinus oedicnemus -,58,-
2004 8-20 May, De Banken, 's-Gravenzande, Westland, Zuid-Holland, photographed (F van der Knaap, J Duindam).
1993 25 April to mid-August, Zwanenwater, Zijpe, Noord-Holland, adult (D van Dijck; D van Lunsen in litt).
The 1993 record concerns a date extension of a bird first present from 4 June to 4 October 1992 and again in 1993, when it was accepted only for 19 July previously (van den Berg & Bosman 2001). The 2004 record concerns a date extension of a bird previously accepted for 8-19 May 2004 (van der Vliet et al 2005). This species is no longer considered since 1 January 2009 but the CDNA still welcomes reports from before this date.

American Golden Plover / Amerikaanse Goudplevier
Pluvialis dominica 1,28,2
14-20 May, Reigersbroek, Roerdalen, Limburg, second calendar-year, photographed, sound-recorded videoed (J Nagtegaal, N Hulsbosch, W Vergoossen et al; Dutch Birding 32: 279, plate 380, 2010); 22-24 May, Roos­kensdonk, Lange Bunders en Slangwijk, Breda, Noord-Brabant, second calendar-year, photographed (C Janssen, H Janssen, G Duijf et al; Dutch Birding 32: 280, plate 383, 2010).
Unusually, both birds were at inland sites. Plumage details showed that they concerned different individ­uals. Many birders associate Nearctic waders with late summer or autumn. However, the month in which this species has been found most is May, with 10 individ­uals, while in October, only six were found.

Pacific Golden Plover / Aziatische Goudplevier
Pluvialis fulva 9,31,2
2-3 May, Bantpolder, Dongeradeel, Friesland, adult, summer plumage, photographed (A Zijlstra, B-J Prak et al; Dutch Birding 32: 279, plate 377, 2010); 16-30 August, Ottersaat, Texel, Noord-Holland, photographed, videoed (N Hoffmann et al; Dutch Birding 32: 354, plate 490, 2010).

'lesser golden plover' / 'kleine goudplevier'
Pluvialis dominica/fulva 0,7,0
2008 13 October, Colijnsplaat, Noord-Beveland, Zee­land, adult, winter plumage, photographed (M Hoek­stein, I Meulmeester, P A Wolf et al); 10-14 November, Stave­nisse, Tholen, Zeeland, photographed (P A Wolf, T Luiten).
The bird in October 2008 was submitted as American Golden Plover P dominica and the one in November 2008 as Pacific Golden Plover P fulva. In both cases, the CDNA could not decide on the specific identity because neither photographs nor description excluded one of the two taxa.

White-tailed Lapwing / Witstaartkievit
Vanellus leucurus 0,8,1
29 May, Vogelmeer, Kennemerduinen, Bloemendaal, Noord-Holland, photographed, sound-recorded, vide­o­ed (H Buckx, L Buckx, P W W de Rouw et al; Dutch Birding 32: 277, plate 376, 282, plate 393, 2010), and 18 June, De Muy and Oostelijk Horsmeertje, Texel, Noord-Holland, adult, photographed (D Schermer, E van der Spek, V Stork et al).
Both records are considered to refer to the same bird. Presumably, it was also the same bird as the one observed intermittently during May to July 2010 at four locations in England (cf Hudson & Rarities Committee 2011). The previous record was in 2002 and most records were in June-July.

Semipalmated Sandpiper / Grijze Strandloper
Calidris pusilla 0,7,0
A bird photographed near Westkapelle, Zeeland, on 23 July (Dutch Birding 32: 354, plate 491, 2010) and possibly the same reported on 24 July (Prunjepolder, Zeeland) and 11-12 August (Serooskerke, Zeeland) is still in circulation.

Pectoral Sandpiper / Gestreepte Strandloper
Calidris melanotos 9,94,-
1999 7 and 24-27 May, De Blikken, Groede, Oostburg, Zeeland (P A Wolf, A Linckens et al).
1991 24-31 May, Kollumerwaard, Kollumerland en Nieuw­kruisland, Friesland (J Brandjes).
The 1991 report is a date extension and locality correction of a bird previously accepted for 24-27 May 1991 in Lauwersmeer, De Marne, Groningen (van den Berg & Bosman 2001). This species is no longer consider­ed since 1 January 2000 but the CDNA still welcomes reports from before this date.

Broad-billed Sandpiper / Breedbekstrandloper
Limicola falcinellus 23,91,-
2002 10-24 August, Zwarte Haan, Het Bildt, Friesland, juvenile (K Scholten).
1995 9-11 July, Eemshaven, Eemsmond, Groningen, adult (K Scholten).
These are date extensions of birds previously accepted for 9-10 July 1995 and 10-17 August 2002. This species is no longer considered since 1 January 2003 but the CDNA still welcomes reports from before this date.

Buff-breasted Sandpiper / Blonde Ruiter
Tryngites ruficollis 3,45,4
8-9 May, Tetjehorn, Slochteren, Groningen, adult, photo­graphed (B-J Prak, M Bot, D Schepers et al); 14-15 May, Tiengemeten, Korendijk, Zuid-Holland, adult, photographed (M Sluijter, G Tanis, T Sluijter); 9-10 October, De Slufter, Texel, Noord-Holland, photographed (D Doo­de­man, J Hulleman, M Zutt et al); 13 October, Slikken van Flakkee, Dirksland, Zuid-Holland, juvenile, photographed (P A Wolf, R M van Loo).
Four in one year is an average number in recent years. Between 2000 and 2010, numbers varied from none in 2002 and 2005 to seven in 2001.

Long-billed Dowitcher / Grote Grijze Snip
Limnodromus scolopaceus 0,22,1
26-28 April, Lingewal, Bemmel, Gelderland, adult, summer plumage, photographed (T de Boer, D Groenendijk, R Wester et al; Dutch Birding 32: 220, plate 299, 2010).
1991 14 August to 6 October, Jan Durkspolder, Smallin­gerland, Friesland.
A few reports from 2010 are still in circulation. Observers are encouraged to document any observation of a presumed Long-billed Dowitcher as completely as possible, preferably with a recording of the flight call, to exclude Short-billed Dowitcher L griseus. The 1991 record is a date extension of a bird previously accepted for 14 August to 5 October (van den Berg & Bosman 2001).

Terek Sandpiper / Terekruiter
Xenus cinereus 1,42,1
24 June to 6 July, Ezumakeeg, Dongeradeel, Friesland, photographed (R Cazemier, A Hamers et al; Dutch Birding 32: 279, plate 379, 2010).
2009 9 July, Prunjepolder, Schouwen-Duiveland, Zee­land (K Hubatsch).

* Grey-tailed Tattler / Siberische Grijze Ruiter
Tringa brevipes 0,0,1
28 July, Zuidpier, IJmuiden, Velsen, Noord-Holland, adult, summer plumage, calling, photographed (A Piek; Piek & Slaterus 2010; Birding World 23: 288, 2010, Dutch Birding 32: 321-323, plate 438-441, 2010).
The bird was photographed by a single observer in late morning on concrete blocks of a pier 1 km off the North Sea beach. The photographs were sent a few hours later by e-mail to CDNA member Roy Slaterus, who identified the bird almost immediately. Despite extensive searching by many people during the same and the following day, it could not be found again. This was only the fourth record for Europe, with previous ones in Wales (1981), Scotland (1994) and Sweden (2003).

Greater Yellowlegs / Grote Geelpootruiter
Tringa melanoleuca 0,3,1
17 October to at least early November 2011, Colijnsplaat, Noord-Beveland, Zeeland, first calendar-year, photographed, sound-recorded, videoed (M Hoekstein et al; Birding World 23: 441, 2010, 24: 10, 2011, Dutch Birding 32: 423, plate 598, 2010, 33: 65, plate 77, 144, plate 153, 273, plate 345, 2011).
This may well be the longest-staying individual of this species in Europe. Previous records were in 1995 (two; also in Zeeland) and 2004.

Lesser Yellowlegs / Kleine Geelpootruiter
Tringa flavipes 2,22,0
2008 8 July, Dijkgatsweide, Wieringermeer, Noord-Holland, adult, summer plumage (V Stork).

Marsh Sandpiper / Poelruiter
Tringa stagnatilis 53,106,-
1992 14 June to 7 August, Oostvaardersplassen, Lelystad, Flevoland (H Buckx et al).
1990 15 August, Oostvaardersdijk, Lelystad, Flevoland (J Brandjes).
The 1992 record concerns a date extension of a bird previously accepted for 22 June to 7 August 1992 (Ovaa et al 2010). This species is no longer considered since 1 January 1993 but the CDNA still welcomes reports from before this date.

Long-tailed Jaeger / Kleinste Jager
Stercorarius longicaudus -,109,-
1980 1 November, De Ven, Enkhuizen, Noord-Holland, first calendar-year, found dead, skin not retained (H Endt).
This individual was identified retrospectively. The finder expected it to be an Arctic Jaeger S parasiticus, made a description and took measurements of the corpse, because he thought an inland find of that species was interesting. More than 30 years later, re-identification was possible because of this description in his old notebook. This species is no longer considered since 1 January 1993 but the CDNA still welcomes reports from before this date.

Slender-billed Gull / Dunbekmeeuw
Chroicocephalus genei 0,8,2
30 April, Westkapelle, Veere, Zeeland, photographed (P A Wolf), and Mokbaai, Texel, Noord-Holland, two, adults, summer plumage, photographed, videoed (A Brenk­man et al; Brenkman 2010; Dutch Birding 32: 218, plate 294, 226: plate 311-312, 2010).
The CDNA decided that the birds at Westkapelle and on Texel concerned the same individuals. From Westkapelle, the birds flew north within minutes after they were discovered at c 12:30. Seven hours later, they were found on Texel, 200 km north of Westkapelle, where they stayed until 20:30 (Brenkman 2010).

Ring-billed Gull / Ringsnavelmeeuw
Larus delawarensis 0,8,0
1999 12 October to 8 February 2000, Goes, Goes, Zeeland, adult (R Sponselee, J Dijkhuizen et al).
This is a date extension of the individual which stayed during eight winters near Goes. For the winter of 1999/2000, it was previously accepted from 20 Novem­ber 1999 to 7 February 2000 (van der Vliet et al 2001).

Baltic Gull / Baltische Mantelmeeuw
Larus fuscus fuscus 0,10,0
2009 1 September, Westkapelle, Veere, Zeeland, adult, wearing colour-ring, photographed (P A Wolf); 6 Octo­ber, Westkapelle, Veere, Zeeland, fourth calendar-year, wearing colour-ring, photographed (I Meulmeester; Dutch Birding 31: 396, plate 54, 2009).
The adult (with yellow ring with inscription C83K on its left leg) had been ringed as a pullus near Mustasaari, Finland, on 21 July 1996. The fourth calendar-year (with black ring with white inscription J781 on its left leg) had been ringed as a pullus in Somna, Nordland, Norway, on 27 July 2006. Only birds ringed at a nest in a 'pure' Baltic Gull colony are currently considered acceptable but this may change when the CDNA decides to follow the recommendations by Altenburg et al (2011), who argue that unringed second calendar-year individuals meeting a strict set of criteria based on plumage and moult are safely identifiable in the field.

Roseate Tern / Dougalls Stern
Sterna dougallii 3,28,2
8-11 June, Flaauwers Inlaag, Schouwen-Duiveland, Zeeland, maximum of two (two on 8 June), adults, summer plumage, photographed (S Lilipaly, P A Wolf et al; Dutch Birding 32: 282, plate 390, 2010).

* Rufous Turtle Dove / Meenatortel
Streptopelia orientalis meena 0,1,0
2009 23 December to 3 April 2010, Wergea (Warga), Boarnsterhim (Boornsterhem), Friesland, adult, photographed, videoed (G Nijboer, D Groenendijk, R Keizer et al; Ebels et al 2010; Birding World 23: 11, 2010, Dutch Birding 32: 117, plate 155-156, 120, plate 157-158, 141, plate 178, 2010).
The bird was first identified on 21 January, when it was feeding amongst Eurasian Collared Doves S decaocto in a backyard in the village of Wergea. Subsequently, it attracted 100s of birders. Later, photographs and observations became known which showed that it had already been present since 23 December 2009. There are no records of the eastern nominate sub­species, Oriental Turtle Dove S o orientalis.

Great Spotted Cuckoo / Kuifkoekoek
Clamator glandarius 7,12,2
24-25 March, Lentevreugd, Wassenaar, Zuid-Holland, second calendar-year, photographed (M Hornsveld, V Jacobs, P Lindenburg et al; Birding World 23: 101, 2010, Dutch Birding 32: 304-305, plate 223-224, 2010); 12-14 July, Zwanenwater, Zijpe, Noord-Holland, juvenile, photographed (F J Koning, M Haas, D van Lunsen; Dutch Birding 32: 272, plate 366, 2010).
These were the first birds since the one at Hoge Veluwe, Gelderland, from 29 March to 3 April 2006.

Eurasian Scops Owl / Dwergooruil
Otus scops 5,3,1
21 May to 19 June, Kootwijkerbroek, Barneveld, Gelder­land, singing, photographed, sound-recorded (T Uljee, B Lijbers, J Lijbers et al; Dutch Birding 32: 281-282, plate 387-388, 2010).
Six out of nine birds were found in May and three of these were singing for almost a month.

Boreal Owl / Ruigpootuil
Aegolius funereus 34,25,0
24 January to 2 July, Hondsrug, Drenthe, three, males, singing, sound-recorded (M Jonker, J Klaver, E de Weerd et al).
The three males, assumed to be returning birds from 2009, all remained unpaired. Interestingly, based on detailed analyses of sonagrams by members of the Werkgroep Ruigpootuilen (Working group for Boreal Owls), the birds moved their territories during spring, even over considerable distances (c 10 km). More detailed information about the sites is not given to minimize the risk of disturbance.

Alpine Swift / Alpengierzwaluw
Apus melba 7,40,2
19 April, De Nek, Drechterland, Noord-Holland, photographed (J Buijsman); 25 April, Ospel, Nederweert, Limburg (F Meeuwissen).

Blue-cheeked Bee-eater / Groene Bijeneter
Merops persicus 0,2,1
16 August, Noordhollands Duinreservaat, Castricum, Noord-Holland, adult, photographed, videoed (H Schekkerman, C de Vries, C Reijnders et al; Schekkerman & Ebels 2010; Dutch Birding 32: 325-327, plate 442-446, 349, plate 482, 2010), and 18 August, Vlaardingse Vlietlanden, Midden-Delfland, Zuid-Holland (M van Schie, D Kunst).
A report on Texel, Noord-Holland, on 8 August is still in circulation. Previous records were also documented by photographs, on 30 September 1961 on Texel and on 18 May 1998 on Terschelling, Friesland. The bird near Castricum was seen for c 3 h, being twitchable for more than 250 birders, and flew off to the south.

Daurian Shrike / Daurische Klauwier
Lanius isabellinus 0,6,1
31 October, Aijen, Bergen, Limburg, first-winter, photographed (P Smeets; Dutch Birding 32: 429, plate 606, 2010).
This is the first record away from the sea coast, in a land-locked province. Another well-photographed individual on 5 September 2010 near Den Helder, Noord-Holland (Dutch Birding 32: 337, plate 466, 2010), is still in circulation.

Woodchat Shrike / Roodkopklauwier
Lanius senator -,74,-
2002 29-31 May, Kennemerduinen, Bloemendaal, Noord-Holland (S Fisher, S Lesley).
This species is no longer considered since 1 January 2004 but the CDNA still welcomes reports from before this date.

Greater Short-toed Lark / Kortteenleeuwerik
Calandrella brachydactyla 3,38,0
2008 20 November 2007 to 21 January, Noordhollands Duinreservaat, Castricum, Noord-Holland.
2007 20 November to 21 January 2008, Noordhollands Duinreservaat, Castricum, Noord-Holland.
1983 9 October, Meeuwenhoek, Wassenaar, Zuid-Holland (A Remeeus).
A bird at De Cocksdorp, Texel, Noord-Holland, on 7 November (Dutch Birding 33: 69, plate 85, 2011) is still in circulation. The 1983 record was erroneously mentioned as a trapped bird but it was only observed in the field and not in the hand (contra van den Berg & Bosman 1999, 2001). The 2007/08 record concerns a date extension of a bird previously accepted for 21 November 2007 to 20 January 2008 (Ovaa et al 2010).

Greenish Warbler / Grauwe Fitis
Phylloscopus trochiloides 6,47,2
31 May, Marnewaard, De Marne, Groningen, singing, photographed, sound-recorded (S Bot, R Ubels, V Voro­nova et al); 17 August, Groene Glop, Schier­mon­nikoog, Friesland, ringed, photographed (W G Gerritse, A G Dui­ven, G A Noorman et al).
Birds photographed at De Cocksdorp, Texel, Noord-Holland, on 3-4 September (Dutch Birding 32: 432, plate 613, 2010) and on Vlieland, Friesland, on 4-5 September are still in circulation.

Arctic Warbler / Noordse Boszanger
Phylloscopus borealis 2,16,1
6 September, Zwanenwater, Zijpe, Noord-Holland, ringed, photographed (F J Koning; Dutch Birding 32: 436, plate 620, 2010).
This was the third record in the first decade of September, the earliest ever being on Vlieland, Friesland, on 1 September 1998. The site where this species was found in 2010 was typical: a ringer's net in one of the northern coastal provinces. Two birds have ever been found in the south-west and only four have been twitchable.

Hume's Leaf Warbler / Humes Bladkoning
Phylloscopus humei 2,36,0
2009 25-27 October, De Geul, Texel, Noord-Holland (P Hoppenbrouwers, E van Dijk, A Wassink et al).
Radde's Warbler / Raddes Boszanger
Phylloscopus schwarzi 2,22,0
2008 26 September, Vuurboetsduin, Vlieland, Friesland (R F J van Beusekom, A Linckens et al).
This was already the seventh for Vlieland. It was the earliest ever and, apart from three other records in the last days of September, all are from October.

Dusky Warbler / Bruine Boszanger
Phylloscopus fuscatus 1,59,0
2007 5 February to 9 April, Electra, De Marne, Groningen (R Gordijn).
Birds ringed at Groene Glop, Schiermonnikoog, Fries­land, on 26 October and Castricum, Noord-Holland, on 9 November are still in circulation. The 2007 record concerns a date extension of a bird previously accepted for 5 February to 7 April 2007 (Ovaa et al 2008).

Siberian Chiffchaff / Siberische Tjiftjaf
Phylloscopus collybita tristis -,34,0
2009 21 December 2008 to 21 February, Lienden, Buren, Gelderland (P G Gelderblom et al).
This concerns a date extension of a bird previously accepted for 21 December 2008 to 2 January 2009 (Ovaa et al 2010). Many reports for 2010 are still in circulation or have not (yet) been submitted, including one at De Cocksdorp, Texel, Noord-Holland, on 17-19 October (Dutch Birding 32: 432, plate 614, 2010) and no less than nine ringing reports.

Iberian Chiffchaff / Iberische Tjiftjaf
Phylloscopus ibericus 2,21,4
17 April to 5 May, Amsterdamse Waterleidingduinen, Zandvoort, Noord-Holland, singing, photographed, sound-recorded, videoed (B van Schooten, R Gordijn et al; Birding World 23: 152, 2010); 2-23 May, Quelderduin, Den Helder, Noord-Holland, singing, photographed, sound-recorded (C van der Vliet, F Geldermans, M Ren­den et al); 6 May, Westhove, Domburg, Veere, Zeeland, photographed, sound-recorded, videoed (J Walhout, R Sponselee, K Leeftink et al); 6 May to 22 June, De Lieberg, Eemnes, Utrecht, and Zuiderheide, Laren, Noord-Holland, singing, photographed, sound-recorded (R W J de Wijs, E B Ebels et al).
A few 2010 reports are still in circulation (including one or two birds at De Cocksdorp, Texel, Noord-Holland, between 25 May and 7 June; Dutch Birding 32: 283, plate 399, 2010) but four in one year is already a record number. In both 2004 and 2007, three singing males were found. Almost two-third of all records date from after 2000.

Subalpine Warbler / Baardgrasmus
Sylvia cantillans 5,52,0
Males (both showing characters indicative of Eastern Subalpine Warbler S c albistriata) photographed and sound-recorded at Zanderij Crailoo, Hilversum, Noord-Holland, on 23 April and at Midden-Eierland, Texel, Noord-Holland, on 9-10 October (Dutch Birding 32: 224, plate 308, 427, plate 603, 2010) are still in circulation.

Pallas's Grasshopper Warbler / Siberische Sprinkhaanzanger
Locustella certhiola 0,8,1
25 September, Noordhollands Duinreservaat, Castricum, Noord-Holland, ringed, photographed, videoed (A Wijker et al; Dutch Birding 32: 436, plate 621, 2010).
The seventh for the ringing station at Castricum...

River Warbler / Krekelzanger
Locustella fluviatilis 6,49,3
23 May, Robbenjager, De Cocksdorp, Texel, Noord-Holland, singing, sound-recorded, videoed (J de Bruijn, D Kok, L B Steijn et al); 6-7 June, Schipborgsche Diep, Aa en Hunze and Tynaarlo, Drenthe, singing, photographed, sound-recorded (S Bot et al); 7-21 June, Piccardthofplas, Groningen, Groningen, singing, photographed, sound-recorded (P Zuidhof et al; Dutch Birding 32: 283, plate 400, 2010).
2001 27 May to 10 June, Leuven, Lingewaal, Gelderland, singing, photographed, sound-recorded, videoed.
2000 2-16 June, Australiëhavenweg, Amsterdam, Noord-Holland, singing, photographed, sound-recorded (P J Marcus).
The 2001 bird was reported for the municipality of Leerdam but was actually holding territory in the municipality of Lingewaal (contra van der Vliet et al 2002). The 2000 record concerns a date extension of a bird previous­ly accepted for 2-15 June 2000 (van der Vliet et al 2001).

Paddyfield Warbler / Veldrietzanger
Acrocephalus agricola 1,27,1
22 August, Valkeveen, Naarden, Noord-Holland, ringed, photographed (R Schippers; Dutch Birding 32: 355, plate 496, 2010).

Blyth's Reed Warbler / Struikrietzanger
Acrocephalus dumetorum 0,11,1
8 and 12 September, Kennemerduinen, Bloemendaal, Noord-Holland, ringed (retrapped on 12 September), photographed (H Buckx, R M van Dongen, P W W de Rouw et al; Dutch Birding 32: 436, plate 623, 2010).
2009 17 June, Scherpenissepolder, Tholen, Zeeland, photographed, sound-recorded (P A Wolf et al).
Birds ringed at Castricum, Noord-Holland, on 9 July and 1 October (Dutch Birding 32: 355, plate 495, 436, plate 622, 2010) are still in circulation. The bird at Scherpenissepolder was the fourth in spring and the fifth to be found in the field. It was very difficult to observe but the sound recordings made it possible to clinch the identification. Reports of possibly this bird the following days could, however, not be accepted due to lack of documentation.

Wallcreeper / Rotskruiper
Tichodroma muraria 0,1,1
22 November to 11 December, ENCI-groeve, Maastricht, Limburg, photographed, videoed (A W J Meijer, A Meijer-Zwaan et al; Meijer 2011; Dutch Birding 32: 408, plate 567, 2010, 33: 34, plate 45-46, 61, plate 70, 2011).
This bird stayed in a quarry in the extreme south-east and was seen daily by a steady stream totalling c 1000 birders. It could be quite elusive for hours but was more reliable during the early morning or late afternoon, flying out of or into its roosting cave. This was the second record; the first concerned a female wintering on high buildings in Amsterdam, Noord-Holland, in the winters of 1989/90 and 1990/91.

Thrush Nightingale / Noordse Nachtegaal
Luscinia luscinia 7,65,5
11 May to 15 June, Meinerswijk, Arnhem, Gelderand, singing, photographed, sound-recorded (D Renssen, A Postma, F Wagenaar et al; Dutch Birding 32: 283, plate 398, 2010); 13 May, Singraven, Dinkelland, Overijssel, singing, sound-recorded (H Meek, H Meek-van Zalk); 23-28 May, Groenlanden, Ooijpolder, Ubbergen, Gelderland, singing, sound-recorded (E van Winden, E van Dijk, M Hornman); 24 May to 9 June, Wiene, Hof van Twente, Overijssel, singing, photographed, sound-recorded (P van den Akker, H de Jong, J Meijerink et al); 5 September, Rohel, Skarsterlân, Friesland, ringed, photo­graphed (J de Jong, W Kok).
2009 25 May, Zwanenwater, Zijpe, Noord-Holland, ringed, photographed (F J Koning).
The only year with more records was 2006, when there were six (the total of seven for 1995 refers to all seven individuals, a pair with five young, of the only breeding record).

Red-spotted Bluethroat / Roodsterblauwborst
Luscinia svecica svecica 24,48,1
22 May, Bergumermeer, Tytsjerksteradiel, Friesland, adult male, ringed, photographed (P Das, B Kooistra).

Red-flanked Bluetail / Blauwstaart
Tarsiger cyanurus 1,8,4
14 October, Zwanenwater, Zijpe, Noord-Holland, ringed, photographed (F Koning; Dutch Birding 32: 429, plate 606, 2010); 25 October, De Monnik, Schier­monnikoog, Friesland (J Vlot, M van Oss); 31 October, Kennemerduinen, Bloemendaal, Noord-Holland, first-year, ringed, photographed (J Zwart, L Buckx, A B van den Berg et al; Dutch Birding 32: 429, plate 607, 2010); 1 November, Kennemerduinen, Bloemendaal, Noord-Holland, first-year male, ringed, photographed (N Ren­sen, J Zwart, A B van den Berg et al; Dutch Birding 32: 431, plate 612, 2010).
A record year, with a remarkable two birds within two days at bird ringing station Vrs Van Lennep at Kennemer­duinen.

Siberian Stonechat / Aziatische Roodborsttapuit
Saxicola maurus 9,27,0
2001 21-23 September, Oost-Vlieland, Vlieland, Friesland, first-winter, photographed (J D Eerdmans, R M van Dongen, P W W de Rouw et al).
A first-winter male on 26-28 September (also) at Oost-Vlieland (Dutch Birding 32: 431, plate 610, 2010) is still in circulation, as is a bird reported on Texel, Noord-Holland, on 10-12 October. The record in 2001 concerns a date extension of a bird previously accepted for 23 September 2001 (van der Vliet et al 2006).

Pied Wheatear / Bonte Tapuit
Oenanthe pleschanka 0,14,1
25 October, Westkapelle, Veere, Zeeland, female, photographed, videoed (C Beeke et al; Dutch Birding 32: 430, plate 609, 2010).

Desert Wheatear / Woestijntapuit
Oenanthe deserti 1,23,4
24-29 October, Waddenzeedijk and Jachthaven, Schier­monnikoog, Friesland, female, photographed (M Hammers, N Lameris, P Lindenburg et al; Dutch Birding 32: 430, plate 608, 2010); 3-5 November, Camperduin, Bergen, Noord-Holland, female, photographed (J van der Kamp, H Niesen et al; Dutch Birding 33: 68, plate 82, 2011); 4-7 November, Stellendam, Goedereede, Zuid-Holland, male, photographed (R Diepstraten, A de Bruijn, M van der Schalk et al; Dutch Birding 32: 68, plate 83, 70, plate 87, 2011); 10 November, Bussumer­heide, Hilversum, Noord-Holland, photographed (S Laan, C Brink­man, C Leijdekker-Winthorst et al).

Rufous-tailed Rock Thrush / Rode Rotslijster
Monticola saxatilis 2,9,1
26 October, Buren, Ameland, Friesland, male, photographed (A Verbies, W Tieman; Dutch Birding 32: 431, plate 611, 2010).
1977 2 June, Strabrechtse Heide, Someren, Noord-Brabant, adult male (P Evers).
The bird on Ameland was the first in autumn and most likely the same bird that stayed on Fanø, Denmark, on 12 October. The bird in 1977 is, in retrospect, the second and the only one in June. All other spring records are from April-May.

Collared Flycatcher / Withalsvliegenvanger
Ficedula albicollis 24,9,0
A bird photographed at Katwijk aan Zee, Zuid-Holland, on 10 October (Dutch Birding 32: 429, plate 604, 2010) is still in circulation, mainly to exclude Semicollared Flycatcher F semitorquata.

Spanish Sparrow / Spaanse Mus
Passer hispaniolensis 0,14,1
6 May, 't Ortolaantje, Zuidpier, IJmuiden, Velsen, Noord-Holland, female, photographed, sound-recorded (R Slaterus, M van den Bergh, J Garvelink; Dutch Birding 32: 284, plate 401, 2010).
2009 9-12 April, Eemshaven, Eemsmond, Groningen, maximum of 10 (four males and six females), photographed, videoed (G J Versteeg, E Dijkstra et al; Versteeg 2009; Dutch Birding 31: 206-207, plate 237-239, 2009).
The circulation of the 2009 record took a while to establish the identification of females as well as the total number of birds involved. After checking as many photographs as possible, four different males and six females were accepted. The Eemshaven location (harbour area) in combination with the flock size provoked discussion about possible ship-assisted arrival. However, there was no direct proof linking the birds to any ship that arrived at or passed the Eemshaven. The female at IJmuiden created a real identification challenge for the observers. Fortunately, the bird was frequently calling and the analysis of the recordings unambiguously proved it to be a Spanish Sparrow.

Citrine Wagtail / Citroenkwikstaart
Motacilla citreola 0,24,4
13 May, Westkapelle, Veere, Zeeland, female, photographed, sound-recorded, videoed (J Walhout, J Tramper, R Sponselee et al; Dutch Birding 32: 281, plate 388, 2010); 14 May, Breezanddijk, Súdwest-Fryslân, Friesland, second calendar-year female, photographed, videoed (V Douwes, F Visscher et al; Dutch Birding 32: 280, plate 385, 2010); 7 June, Ezumakeeg, Dongeradeel, Friesland, female, photographed, videoed (B-J Prak, R Cazemier); 31 October to 2 November, Klaas Henne­poelpolder, Warmond, Teylingen, Zuid-Holland, adult, photographed, videoed (S Gobin et al; Birding World 23: 470, 2010, Dutch Birding 32: 433, plate 617, 33: 69, plate 84, 2011).
2009 19 August, Oude Waal, Ooijpolder, Ubbergen, Gelderland, first calendar-year, photographed (R Wester, J van der Zee et al; Dutch Birding 31: 326, plate 432, 2009).
With four records each, 2009 and 2010 are both record years for this species. The species, which is still spreading west in Finland and Germany, was first recorded in August-September 1984. In 1990-99 (11) and 2000-09 (12), a total of 23 individuals was found. Almost 30% of all birds were recorded in 2009-10.

Olive-backed Pipit / Siberische Boompieper
Anthus hodgsoni 0,21,1
22-23 October, Reddingsweg, Schiermonnikoog, Fries­land, photographed (V Jacobs, M Hornsveld, E B Ebels et al).

Arctic Redpoll / Witstuitbarmsijs
Carduelis hornemanni 43,67,0
Birds photographed at Sluftervallei, Texel, Noord-Holland, on 14 November (Dutch Birding 33: 71, plate 88, 2011) and trapped on Schiermonnikoog, Friesland, on 24 November are still in circulation. Totals include Hornemann's Redpoll C h hornemanni (one).

Baltimore Oriole / Baltimoretroepiaal
Icterus galbula 0,2,0
2 December 2009 to 14 April, Oudorp, Alkmaar, Noord-Holland, first-winter male, photographed, sound-recorded, videoed (J van der Ploeg, M Argeloo, D Doo­de­man et al; Argeloo 2010; Birding World 23: 10, 2010, 24: 42, 2011, Dutch Birding 32: 61, plate 75, 74, plate 94-96, 223, plate 303, 2010).
This record was already mentioned in last year's report (Ovaa et al 2010) but is repeated here because the bird stayed into 2010.

* Northern Waterthrush / Noordse Waterlijster
Parkesia noveboracensis 0,0,1
18-21 September, Oude Eendenkooi, Vlieland, Friesland, first calendar-year, photographed, videoed (B Gaxiola, J de Bruijn, A Linckens et al; Gaxiola 2010; Birding World 23: 382, 2010, Dutch Birding 32: 341, plate 470, 358-359, plate 500-503; 435, plate 619, 2010).
This was proclaimed as the 500th species for the Dutch avifaunal list. It concerned (only) the species' 14th record for Europe and the WP, with previous ones in England (six), France (three), Ireland (two), Channel Islands (one) and on a ship near the Azores (one, followed by one on Corvo in October 2010). During its four-day stay, it was visited by more than 500 birders. Vlieland is getting known as the Netherlands' American songbird trap as it was also the island where three Red-eyed Vireos Vireo olivaceus, the first Baltimore Oriole Icterus galbula and a Myrtle Warbler Setophaga coronata were found.

Systematic list of rejected reports
This list contains all records not accepted by the CDNA. Records marked with @ were rejected by all committee members in the first or second voting. Most records were rejected because the identification was not fully established (often due to lack of documentation) or when the bird showed signs of captivity, such as dubious rings, excessive wear and/or aberrant behaviour. Species for which the CDNA unanimously decided that all records up to and including 2010 refer to birds of captive origin are indicated with *. This included records of birds of which all ancestors are assumed to be of captive origin (introduced species of British category C).

Greenland White-fronted Goose / Groenlandse Kolgans Anser albifrons flavirostris 12 March, Polder Pauluszand, Werkendam, Noord-Brabant (@ description incomplete). * Hooded Merganser / Kokardezaagbek Lophodytes cucullatus 9 January, Braamberg, Stadskanaal, Groningen, male, photographed (@ identification accepted but legs not sufficiently seen (and photographed) to exclude presence of rings). Blue-winged Teal / Blauwvleugeltaling Anas discors 14 July, Eijsder Beemden, Eijsden, Limburg, male (@ description incomplete, hybrid ducks resembling this species not excluded). Yellow-billed Loon / Geelsnavelduiker Gavia adamsii 11 October, Rottumeroog, Eemsmond, Groningen (@ incomplete description of bird flying by). Black-winged Kite / Grijze Wouw Elanus caeruleus 3 August, Drents-Friese Wold, Oost­stellingwerf, Friesland (@ description incomplete). Cinereous Vulture / Monniksgier Aegypius monachus 24 March, Hallum, Ferwerderadiel (Ferwerderadeel), Friesland, photographed (Dutch Birding 32: 218, plate 291, 2010; identification accepted; individual identified as 'Thécla' based on bleached primaries, which had been born in Spain and released at Gorges du Verdon, Alpes-de-Haute-Provence, France, on 9 December 2008; life history prevents acceptance as genuine vagrant). Short-toed Snake Eagle / Slangenarend Circaetus gallicus 20 April, Regte Heide, Goirle, Noord-Brabant (@ description incomplete); 15 May, Noordse Veld, Tynaarlo, Drenthe (@ description incomplete); 28 May, Overdiemerpolder, Diemen, Noord-Holland (@ description incomplete); 7 June, Groningen, Groningen (@ seen without binoculars by observer driving on highway, so description incomplete); 11 July, Schoorkuilen, Neder­weert, Limburg (@ description incomplete and partly wrong). Pallid Harrier / Steppekiekendief Circus macrourus 14 May, Verdronken Land van Saeftinghe, Hulst, Zeeland, female, photographed (@ photographs show Montagu's Harrier C pygargus). Golden Eagle / Steenarend Aquila chrysaetos 31 January, Oldebroekse Heide, Oldebroek, Gelderland (@ description incomplete). Gyr Falcon / Giervalk Falco rusticolus 6 April, Grutte Brekken, Lemsterland, Friesland (@ description incomplete, hybrid with other large falcons not excluded, no information about possibility of escape). White-rumped Sandpiper / Bonapartes Strandloper Calidris fuscicollis 15 July, Dijkgatsweide, Wieringermeer, Noord-Holland, adult, photographed (@ photographs too blurry and description not detailed enough to clinch identification). Ivory Gull / Ivoormeeuw Pagophila eburnea 4 November, beach Noordhollands Duinreservaat, Heemskerk, Noord-Holland (@ description incomplete and partially wrong, aberrant individuals of other gull species not excluded). * Laughing Dove / Palmtortel Streptopelia senegalensis 22-28 July Bredevoort, Aalten, Gelderland (@ identification accepted but considered escape; it had broken wing- and tail-feathers and was very tame). Pale Barn Owl / Witte Kerkuil Tyto alba alba 30 July, Werendijke, Veere, Zeeland, photographed (@ Dark Barn Owl T a guttata not excluded). Alpine Swift / Alpengierzwaluw Apus melba 12 May, Philipsdam, Schouwen-Duiveland, Zeeland, photographed (@ photographs show aberrant Common Swift A apus). Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei 9-10 January, Hillegom, Zuid-Holland, photographed (@ bird looked more like Yellow-browed Warbler P inornatus). Arctic Redpoll / Witstuitbarmsijs Carduelis hornemanni 27 November, Stevensbeek, Sint Anthonis, Noord-Brabant, photographed (@ very probably Mealy Redpoll C flammea). Pallas's Bunting / Pallas' Rietgors Emberiza pallasi 18 April, Honderd Morgen, Vught, Noord-Brabant (@ incomplete description of this potentially new species).

Ross's Goose / Ross' Gans
Anser rossii 18 December, Leusderheide, Leusden, Utrecht, photographed (@ from flight photograph of this migrating bird it was not possible to distinguish between Ross's Goose and Snow Goose A caerulescens). Blue-winged Teal / Blauwvleugeltaling Anas discors 30-31 January, Kinderdijk, Nieuw-Lekkerland, Zuid-Holland, adult male (only seen for a few minutes; hybrids with, eg, Northern Shoveler A clypeata not fully excluded). Marbled Duck / Marmereend Marmaronetta angustirostris 8-20 July, Westkapelle, Veere, Zeeland, photographed (@ identification accepted but this (unringed) individual showed several broken feathers in its left wing, which may be indicative of earlier captivity; cf Dutch Birding 31: 324, plate 425, 2009). Griffon Vulture / Vale Gier Gyps fulvus 28 May, Angerenstein, Arnhem, Gelderland (@ almost no description). Booted Eagle / Dwergarend Aquila pennata 9 June, Papendrecht, Zuid-Holland (@ description incomplete). Black-winged Pratincole / Steppevorkstaartplevier Glareola nordmanni 19 August, Zwanenwater, Zijpe, Noord-Holland (CDNA is not convinced that it is possible to exactly ascertain colour of underwing-coverts of quickly passing bird; description did not give information why it actually concerned a pratincole Glareola). Terek Sandpiper / Terekruiter Xenus cinereus 28 July, Grutte Brekken, Lemsterland, Friesland (description incomplete). Siberian Chiff­chaff / Siberische Tjiftjaf Phylloscopus collybita tristis 15 January, IJsselmonding, Ketelmeer, Kampen, Over­ijssel, photographed (not completely meeting all criteria defined by CDNA). River Warbler / Krekelzanger Locustella fluviatilis 10 June, Katwijk aan Zee, Katwijk, Zuid-Holland (@ no sound-recording, bird only seen in flight, so description incomplete). Citrine Wagtail / Citroenkwikstaart Motacilla citreola 21 October, De Petten, Texel, Noord-Holland (@ description incomplete).

* Hooded Merganser / Kokardezaagbek
Lophodytes cucullatus 4 November, Wanneperveen, Steenwijkerland, Overijssel, adult female, photographed (@ identification accepted but legs were not sufficiently seen (and photographed) to exclude the presence of rings). Cory's/Scopoli's Shearwater / Kuhls/Scopoli's Pijlstormvogel Calonectris borealis/diomedea 21 November, West­kapelle, Veere, Zeeland (description incomplete). Pallid Harrier / Steppekiekendief Circus macrourus 25 September, Uilenbroeken, Borger-Odoorn, Drenthe, adult male (@ description incomplete). Booted Eagle / Dwergarend Aquila pennata 11 May, Dwingelderveld, Westerveld, Drenthe (@ description incomplete). Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei 22-23 December, Enkhuizen, Noord-Holland, photographed (CDNA is convinced that bird was either Hume's Leaf Warbler or Yellow-browed Warbler P inornatus but description and photographs not detailed enough to distinguish between these two species). Siberian Chiffchaff / Siberische Tjiftjaf Phylloscopus collybita tristis 15, 19 and 22 April, Nieuwe Meer, Amster­dam, Noord-Holland, sound-recorded (@ call not characteristic for Siberian Chiffchaff). Collared Flycatcher / Withalsvliegenvanger Ficedula albicollis 4 October, Klein Zwitserland, Schiermonnikoog, Fries­land, first calendar-year, photographed (@ flycatcher with a relatively large primary patch but photographs not detailed enough to exclude Pied Flycatcher F hypoleuca).

Pallid Harrier / Steppekiekendief
Circus macrourus 16 June, Egmond aan Zee, Bergen, Noord-Holland, adult male (@ description incomplete).

American Wigeon / Amerikaanse Smient
Anas americana 25 February, De Hoge Dijk, Amsterdam, Noord-Holland, male, photographed (@ bird showing characteristics of hybrid between American Wigeon and Eurasian Wigeon A penelope or Chiloe Wigeon A sibilatrix).

Short-toed Snake Eagle / Slangenarend
Circaetus gallicus 5 July, De Hamert, Bergen, Limburg (description incomplete). Trumpeter Finch / Woestijnvink Bucanetes githagineus 7 September, Hemweg, Amsterdam, Noord-Holland, adult male (description just not complete enough to convince CDNA).

Short-toed Snake Eagle / Slangenarend
6 July, Dwingelderveld, Westerveld, Drenthe (@ description incomplete). Booted Eagle / Dwergarend Aquila pennata 15 April, Brakkenstein, Nijmegen, Gelderland (@ description incomplete).

Long-tailed Jaeger / Kleinste Jager
Stercorarius longicaudus 22 September, Camperduin, Bergen, Noord-Holland, second calendar-year (@ CDNA requires detailed description of this plumage, which is probably very rare in North Sea area).

Yellow-billed Loon / Geelsnavelduiker
Gavia adamsii 24 February, beach, Noordwijk, Zuid-Holland (description very incomplete, mentioning yellow bill only not enough to convince CDNA). Pectoral Sandpiper / Gestreepte Strandloper Calidris melanotos 28 July, Keersluisplas, Lelystad, Flevoland (@ in 1985 CDNA rejected this report; no really new information was given and CDNA did not see a reason to reconsider its decision).

Great Snipe / Poelsnip
Gallinago media 1 January, Stulpheide, Baarn, Utrecht (@ description incomplete).

European Roller / Scharrelaar
Coracias garrulus 9 June, Noetselerberg, Hellendoorn, Overijssel (@ description incomplete).

Booted Eagle / Dwergarend
Aquila pennata 11 June, Tongelreep, Valkenswaard, Noord-Brabant (@ description incomplete; if accepted, it would have been chronologically the first, which means that description (preferably supported by photographs) needs to be close to perfect).

The CDNA wishes to thank Bram Rijksen who kindly provided the drawing of the Northern Waterthrush on p 357. The editors of Dutch Birding assisted in checking the content.

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Arjan Ovaa, In de Molt 112, 6269 EJ Margraten, Netherlands
Dick Groenendijk, Elzenstraat 14, 4043 PB Opheusden, Netherlands
Max Berlijn, Wilhelminastraat 9, 6285 AS Epen, Netherlands
CDNA, p/a Duinlustparkweg 98A, 2082 EG Santpoort-Zuid, Netherlands (