Kies Nederlands Switch to English
Roze Spreeuw
Roodkeelnachtegaal
Hoogwoud


Even geduld...

Dutch Birding volume 23 (2001) no 4


2001-4 read online


Artikelen / papers
175  Identification of Two-barred, Greenish, Bright-green and Arctic Warblers Roland E van der Vliet, Peter R Kennerley & Brian J Small
  Extra's: Sound files and accompanying sonagrams
191  Two-barred Warbler on Terschelling in October 1996 Roland E van der Vliet
196  Hybridisatie tussen Waterhoen en Meerkoet [Hybridisation between Common Moorhen and Eurasian Coot] Johan H van Balen, Albert C Perdeck & Harvey van Diek
203  Broedgeval van Noordse Nachtegaal in Flevoland in 1995 [Breeding record of Thrush Nightingale in Flevoland in 1995] Ruud F J van Beusekom
208  Grijskopspecht in Oosterbeek in 2000 en 2001 [Grey-headed Woodpecker at Oosterbeek in 2000 and 2001] Wim B Janssen, Piet R Wiepkema, Stoffer Westerbrink & Wim M Wiegant

Masters of mystery
211  Solutions of third round 2001: Willow Warblers; Fourth round 2001 Diederik Kok & Niels van Duivendijk

Total Birding
216  Among the natives Anthony McGeehan

Recencies / reviews
218  Threatened birds of the world by Alison J Stattersfield & David R Capper (editors) Enno B Ebels

Aankondigingen & verzoeken / announcements & requests
219  Kleurmerkonderzoek bij Steenlopers; Italian rarities committee; Vogeldag nu ook in België; Ringers requested for National Park of Donana

WP reports
220  WP reports: May-July 2001 Arnoud B van den Berg

Recente meldingen / recent reports
230  Nederland: mei-juni 2001 Ruud M van Dongen, Klaas Haas & Peter W W de Rouw
238  België: mei-juni 2001 Gerald Driessens

DB actueel
240  Aasgier bij Epen: nieuw voor Nederland [Egyptian Vulture]; Succesvol broedgeval van Kraanvogels in Fochtelooërveen [Breeding Common Cranes]; Roze Pelikaan verdwaald op Noordzee [Great White Pelican]; Witstaartkievit en Woestijnplevier in Lepelaarsplassen [White-tailed Lapwing and Greater Sand Plover]; 18 Vale Gieren in Nederland [Eurasian Griffon Vultures]

Voorplaat / front cover
  Gele Zwartkeelzanger / Black-throated Green Warbler Dendroica virens, Point Pelee, Canada, 6 mei 2000 (René van Rossum)

Identification of Two-barred, Greenish, Bright-green and Arctic Warblers

Sonagrams and sound-clips of Two-barred Phylloscopus plumbeitarsus, Greenish P trochiloides viridanus, Bright-green P nitidus and Arctic Warblers P borealis. All sonagrams refer to normal contact calls, except when stated otherwise. Note variation in contact calls. In all sonagrams distances between calls have been shortened. Each call is treated individually. In the sound-clips presented here it was also sometimes necessary to shorten distances between calls to reduce the size of the files, but the extremely short distances used in the sonagrams would make for difficult listening. Sound-clips where the distances between calls have been altered are marked with a *. Where there is no * the timing is unaltered from the original recording. Sometimes there are several calls from a single sound-recording, and these have often been chosen from different parts of a recording. In most cases an affort has been made to illustrate the same calls in the same order both in the sound-clip and the sonagram. In three cases song was also included in the sound-clip to illustrate the context in which the calls were heard.

 

Two-barred Warbler / Swinhoes Boszanger Phylloscopus plumbeitarsus

figure 1

a: Adult male, Sayan mountains, Tuva, south-central Siberia, Russia, July 1995 (Magnus S Robb)
b: Khao Yai, Thailand, 17 November 1991 (Arnoud B van den Berg)
c*: Khao Yai, Thailand, 20 November 1991 (Arnoud B van den Berg)
d: Khao Yai, Thailand, 20 November 1991 (Arnoud B van den Berg)
e*: Khao Yai, Thailand, 29 November 1991 (Arnoud B van den Berg). Includes some high, sharp, short calls which might be mistaken for Arctic Warbler P borealis
f: Khao Yai, Thailand, 29 November 1991 (Arnoud B van den Berg)

 

Greenish Warbler / Grauwe Fitis Phylloscopus trochiloides viridanus

figure 2

a*: De Cocksdorp, Texel, Noord-Holland, Netherlands, 2 September 1999 (Roy Slaterus)
b: Probably juvenile male, IJmuiden, Velsen, Noord-Holland, Netherlands, 9 September 2000 (Magnus S Robb/The Sound Approach)
c: Chokpak Ornithological Station, Kazakhstan, 12 May 2000 (Magnus S Robb/The Sound Approach)
d*: Chokpak Ornithological Station, Kazakhstan, 12 May 2000 (Magnus S Robb/The Sound Approach)
e*: Near Bolshoe Almaty Lake, 32 km south of Almaty, Kazakhstan, 18 May 2000 (Magnus S Robb/The Sound Approach)

 

Bright-green Warbler / Groene Fitis Phylloscopus nitidus (Arnoud B van den Berg)

figure 3

a*: 3 km south of Ikizdere, Rize, Turkey, altitude 1300 m, 13 May 1987. Note that a call proceeds each of the two song phrases
b*: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987
c: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987
d*: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987
e: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987

 

Arctic Warbler / Noordse Boszanger Phylloscopus borealis (Arnoud B van den Berg)

figure 4

a: Bloemendaal, Noord-Holland, Netherlands, 9 September 1991. Call of trapped bird in cage
b: Bang Thieo, south-east of Krabi, Thailand, 11 May 1994
c: Kuala Selangor, Selangor, Malaysia, 19 October 1993
d: Ko Libong Island, west of Trang, Thailand, 18 March 1989. Variable calls given in context of 'plastic' or developmental song. Note that this sound-clip is a section of the original recording including song and illustrates a selection of calls similar but not identical to those in the sonagram.

 

Sonagrams and sound-clips of 'thin calls' of Bright-green P nitidus, Arctic P borealis, Greenish P trochiloides viridanus and Two-barred Warblers P plumbeitarsus. 'Thin calls' can be given in several contexts. Note variation. In all sonagrams distances between calls have been shortened

figure 5

Bright-green Warbler / Groene Fitis Phylloscopus nitidus
a: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987 (Arnoud B van den Berg). Alarm calls
b: 7 km north of Ikizdere, Rize, Turkey, altitude 1000 m, 14 May 1987 (Arnoud B van den Berg). Alarm calls

Arctic Warbler / Noordse Boszanger Phylloscopus borealis
c: Ko Libong Island, west of Trang, Thailand, 18 March 1989 (Arnoud B van den Berg). Calls given in context of 'plastic' or developmental song

Greenish Warbler / Grauwe Fitis Phylloscopus trochiloides viridanus
d: Adult male, Chokpak Ornithological Station, Kazakhstan, 12 May 2000 (Magnus S Robb/The Sound Approach). Calls given during song bout

Two-barred Warbler / Swinhoes Boszanger Phylloscopus plumbeitarsus
e: Cat Tien, Vietnam, 16 January 1998 (Edward Vercruysse)

Comments, sonagrams and preparation of sound clips by Magnus S Robb, André J van Loon and Arnoud B van den Berg.