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Dutch Birding volume 33 (2011) no 1


2011-1


Artikelen / papers
Variation and difference in song between Western Bonelli’s Warbler and Eastern Bonelli’s Warbler [Variatie en verschil in zang tussen Bergfluiter en Balkanbergfluiter] Dick Groenendijk & Teus J C Luijendijk
  Extra's: soundrecordings accompanying this paper
Taimyr Gulls: evidence for Pacific winter range, with notes on morphology and breeding [Taimyrmeeuwen: bewijzen voor Pacifisch overwinteringsgebied en gegevens over morfologie en broeden] Klaas van Dijk, Sergei Kharitonov, Holmer Vonk & Bart Ebbinge
22  Birding in Brazil: Alta Floresta region Alexander C Lees
34  Rotskruiper bij Maastricht in november-december 2010 [Wallcreeper near Maastricht in November-December 2010] Arnold W J Meijer
38  Blauwe vorm Ross’ Gans op Schiermonnikoog in mei 2009 [Blue morph Ross’s Goose on Schiermonnikoog in May 2009] Martijn Bot
40  Reed Cormorant collected in Catalunya, Spain, in c 1855 osé Luis Copete, Xavier Ferrer, David Bigas, Carola Sanpera & David R Vieites
43  Black Guillemot at N’Gor, Senegal, in October 2008 Pierre Crouzier, Philippe J Dubois, Jean-Yves Frémont & Alain Verneau
44  Two Dickcissels and Dark-eyed Junco on Flores, Azores, in November 2009 Nico de Vries

Redactiemededelingen / Editorial notes
47  Naamgeving van taxa in Dutch Birding [Taxa names in Dutch Birding]
50  Vernieuwing binnen redactie

Corrigenda
50 

WP reports
31  Late November 2010–mid-January 2011 Arnoud B van den Berg & Marcel Haas

Recente meldingen / recent reports
61  November-december 2010 Roy Slaterus & Vincent van der Spek

DB actueel
71  Mobiele Grote Trap als Kerstverrassing [Great Bustard]; Recently described bird species

Voorplaat / front cover
  Tristrams Spreeuw / Tristram’s Starling Onychognathus tristramii, Aym Hamran, Oman, 17 april 2010 (René Pop/The Sound Approach)

Sound recordings for the paper: "Variation and difference in song between Western Bonelli's Warbler and Eastern Bonelli's Warbler" by Dick Groenendijk & Teus J C Luijendijk, DB 33: 1-8, 2011.

Fig.2Figure 2 Five examples of song trills of Western Bonelli's Warbler Phylloscopus bonelli illustrating amount of variation / Vijf voorbeelden van trillers van Bergfluiter Phylloscopus bonelli ter illustratie van variatie.

Bon1, bon2 & bon4 (recording of same individual / opname van zelfde individu): Tornavacas, Sierra de Gredos, Extremadura, Spain, 11 June 2002 (Arnoud B van den Berg/The Sound Approach)

bon3: Hoyos de Espinosa, Plataformes de Gredos, Castilla y Léon, Spain, 11 June 2002 (Arnoud B van den Berg/The Sound Approach)

bon5: Valencia, Spain, 15 April 2001 (Geoff Sample, as published in Sample (2003)).

 

Fig.3

Figure 3 Five examples of song trills of Eastern Bonelli's Warbler Phylloscopus orientalis illustrating amount of variation / Vijf voorbeelden van trillers van Balkanbergfluiter Phylloscopus orientalis ter illustratie van variatie.

Ori1 & ori2 (recording of same individual / opname van zelfde individu): Akseki, Turkey, 12 May 2001 (Magnus Robb/The Sound Approach)

ori3: Avas valley, Evros, East Macedonia, Greece, 27 April 2002 (Magnus Robb/The Sound Approach)

ori4: lake Megali Prespa, West Macedonia, Greece, 8 May 2002 (Magnus Robb/The Sound Approach)

ori5: Kennemerduinen, Bloemendaal, Noord-Holland, Netherlands, 15 May 1983 (Cornelis J Hazevoet, as published in Sample (2003)).