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Even geduld...

Dutch Birding volume 23 (2001) no 5


2001-5 read online


Artikelen / papers
247  Identification and ageing of Glaucous-winged Gull and hybrids Enno B Ebels, Peter Adriaens & Jon R King
271  Glaucous-winged Gull at Essaouira, Morocco, in January 1995 Theo Bakker, Koen van Dijken & Enno B Ebels
275  Calls compared: Hume's Leaf Warbler and Yellow-browed Warbler in autumn and winter in the Netherlands Teus J C Luijendijk
  Extra's: Sound files and accompanying sonagrams
284  Arendbuizerd in Flevoland in september 2000 [Long-legged Buzzard in Flevoland in September 2000] C Hubert Tonino & Wies J M de Valk

Brieven / letters
288  Iris colour of Peruvian Booby Guido O Keijl

Recencies / reviews
289  African bird sounds Volume 1 & 2 (four CDs and booklet) by Claude Chappuis Arnoud B van den Berg

Masters of mystery
291  Solutions of fourth round 2001: Water Pipit and White-rumped Sandpiper; Fifth round 2001 Diederik Kok & Niels van Duivendijk

Total Birding
294  Birds, camera, action Anthony McGeehan

WP reports
296  WP reports: August-early September Arnoud B van den Berg

Recente meldingen / recent reports
302  Nederland: juli-augustus 2001 Ruud M van Dongen, Klaas Haas & Peter W W de Rouw
307  België: juli-augustus 2001 Gerald Driessens

DB actueel
310  Wenkbrauwalbatros langs Vlieland [Black-browed Albatross]; Verdachte Giervalk in Groningen [Gyr Falcon]

CDNA-mededelingen
311  Recente CDNA-besluiten

Corrigenda
312   

Aankondigingen & verzoeken / announcements & requests
313  Vogelgeluidenclub; Boek over Groningse Bijeneters

DBA-nieuws / DBA-news
313  Betaling van abonnementsgeld voor 2002; Payment of subscription for 2002; Korting op British Birds; Concessionary rate for British Birds

Voorplaat / front cover
  Poelsnip / Great Snipe Gallinago media, Lesbos, Griekenland, 3 mei 2001 (Rene Pop)

Calls compared: Hume's Leaf Warbler and Yellow-browed Warbler in autumn and winter in the Netherlands

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (13 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Wassenaar, Zuid-Holland, Netherlands, 13 December 1990 (Teus J C Luijendijk). ´Classic´ disyllabic humei call with first syllable stressed and obvious downward inflection in second part.


Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (13 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Den Haag, Zuid-Holland, Netherlands, 2 January 1996 (Teus J C Luijendijk). Less obvious disyllabic but still with clear ´partition´.

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (14 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Katwijk aan Zee, Zuid-Holland, Netherlands, 8 November 1999 (Teus J C Luijendijk). Rather short disyllabic call with upward inflection.

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (9 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Zwartewaal, Zuid-Holland, Netherlands, 8 January 2000 (Teus J C Luijendijk). Short call, almost becoming single toned.

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (10 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, De Blocq van Kuffeler, Flevoland, Netherlands, 30 December 1990 (Teus J C Luijendijk). Short monosyllabic call recalling Northern Chiffchaff P colllybita.

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (12 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Katwijk aan Zee, Zuid-Holland, Netherlands, 8 November 1999 (Teus J C Luijendijk). Short monosyllabic call, uttered in series (one call note shown).

 

Hume's Leaf Warbler / Humes BladkoningHume's Leaf Warbler / Humes Bladkoning

example of this call (14 kB)
Hume's Leaf Warbler / Humes Bladkoning Phylloscopus humei humei, contact call, Zwartewaal, Zuid-Holland, Netherlands, 8 January 2000 (Teus J C Luijendijk). Short and high-pitched monosyllabic call.

 

Yellow-browed Warbler / BladkoningYellow-browed Warbler / Bladkoning

example of this call (19 kB)
Yellow-browed Warbler / Bladkoning Phylloscopus inornatus, contact call, Vlieland, Friesland, Netherlands, 28 September 1997 (Teus J C Luijendijk). Typical high-pitched, drawn-out disyllabic inornatus call with upward inflection.

 

Yellow-browed Warbler / BladkoningYellow-browed Warbler / Bladkoning

example of this call (18 kB)
Yellow-browed Warbler / Bladkoning Phylloscopus inornatus, contact call, Vlieland, Friesland, Netherlands, 8 October 1999 (Teus J C Luijendijk). Slightly more monosyllabic than typical call.

 

Yellow-browed Warbler / BladkoningYellow-browed Warbler / Bladkoning

example of this call (38 kB)
Yellow-browed Warbler / Bladkoning Phylloscopus inornatus, agitated or contact call, Kennemerduinen, Noord-Holland, Netherlands, 16 October 1999 (Roy Slaterus). Monosyllabic call lacking upward inflection of Hume's Leaf Warbler P humei.