Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Coordinators:
Jean-Michel Sauvage (France)
Mars Muusse (the Netherlands)

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Herring Gull plumages:

HG 1cy July
HG 1cy August
HG 1cy September
HG 1cy October
HG 1cy November
HG 1cy December

HG 2cy January
HG 2cy February
HG 2cy March
HG 2cy April
HG 2cy May
HG 2cy June
HG 2cy July
HG 2cy August
HG 2cy September
HG 2cy October
HG 2cy November
HG 2cy December

HG 3cy January
HG 3cy February
HG 3cy March
HG 3cy April
HG 3cy May
HG 3cy June
HG 3cy July
HG 3cy August
HG 3cy September
HG 3cy October
HG 3cy November
HG 3cy December

HG sub-ad Jan.
HG sub-ad Feb.
HG sub-ad March
HG sub-ad April
HG sub-ad May
HG sub-ad June
HG sub-ad July
HG sub-ad Aug.
HG sub-ad Sept.
HG sub-ad Oct.
HG sub-ad Nov.
HG sub-ad Dec.

HG adult January
HG adult February
HG adult March
HG adult April
HG adult May
HG adult June
HG adult July
HG adult August
HG adult September
HG adult October
HG adult November
HG adult December

Herring Gull (argenteus) BG.0B 2CY, September 25 2018, Westkapelle, the Netherlands.

Blue BG.OB and metal Bruxelles BLB L925829. Ringed as Lesser Black-backed Gull pullus on July 05 2017 at Zeebrugge (Voorhaven), West-Vlaanderen, België (51°21'0''N 3°11'0''E).

05/07/2017 Zeebrugge (Voorhaven), West-Vlaanderen, België 51°21'0''N 3°11'0''E INBO
07/12/2017 Curgies (Vuilstort), Nord, Frankrijk 50°20'0''N 3°36'0''E Leirens, Vincent
15/12/2017 Curgies (Vuilstort), Nord, Frankrijk 50°20'0''N 3°36'0''E Leirens, Vincent
22/12/2017 Curgies (Vuilstort), Nord, Frankrijk 50°20'0''N 3°36'0''E Leirens, Vincent
15/09/2018 Westkapelle (Zeedijk), Zeeland, Nederland 51°32'0''N 3°26'0''E Tuls, Johan
15/09/2018 Westkapelle (Zeedijk), Zeeland, Nederland 51°32'0''N 3°26'0''E Spée, Bas
25/09/2018 Westkapelle, Zeeland, Nederland 51°32'0''N 3°26'0''E Muusse, Mars

Some scaps seem to develop into pale grey, which would better fit small female Herring Gull. Or indeed Lesser Black-backed Gull, mimicking a Herring.