Black-headed Gull Chroicocephalus ridibundus
(last update:
19-03-2014) |
Moderators:
Tim Audenaert
Maarten van Kleinwee
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Black-headed Gull - Adult April
This section deals with adult Black-headed Gulls in the month of April.
Adult Black-headed Gulls in April are in full summer plumage.
This plumage is characterized as follows:
- Head: Hood rather small and elliptical shape, not extending to nape. Colouration is dark chocolate-brown, rear margin darkest. White crescents above and below eye, usually joining at rear. Orbital ring maroon- red. Iris brown. Bill dark maroon- red. Mouth and gape btright red. Hindneck white.
- Upperparts and most of wing coverts: mid grey. Marginal coverts and outer primaries coverts: white.
- Upperwing ‘tricoloured’: grey, with a white triangle on the outer primaries (P7-P10) and a black wing-tip pattern on p5-p10.
- p7-p10: white (P10 with black edge of outer web not reaching tip)
- p5-p10: black-tipped, extending on to inner edge of inner web
- p1-p6: grey with blackish-grey innerwebs on p1-p5
- secondaries: grey with white tips
- Underwing: outer primaries white, dark tipped, mid primaries dark
- Axillaries and lesser underwingcoverts: greyish-white
- Legs dark reddish.
- Tail: all white
Most of the description follows:
P.J. Grant: "Gulls, a guide to identification".
K.M.Olsen: “Gulls of Europe, Asia and North America”.
| Third-calendar year |
Black-headed Gull 3cy Arnhem 3649106.
April 18, 2010, Starrevaart, Leidschendam, The Netherlands
(52.10N 04.43E)
Photo: Maarten van Kleinwee.
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Black-headed Gull adult H-H.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Adult
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Black-headed Gull adult 5.1.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Black-headed Gull adult E5RE.
April 2, 2011, Zoetermeer, Benthuizerplas, The Netherlands
(52.076N, 4.532E)
Photo: Maarten van Kleinwee.
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Black-headed Gull adult A-E.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Black-headed Gull adult A-F.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Black-headed Gull adult E9MF.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Black-headed Gull adult X-K.
April 2, 2013, Oosterpark, Amsterdam, The Netherlands
(52.21N, 4.55E)
Photo: Anders Svensson.
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Black-headed Gull adult E5AV.
April 11, 2010, Zoetermeer, Benthuizerplas, The Netherlands
(52.076N, 4.532E)
Photo: Maarten van Kleinwee.
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Black-headed Gull adult E5CZ.
April 11, 2010, Zoetermeer, Benthuizerplas, The Netherlands
(52.076N, 4.532E)
Photo: Maarten van Kleinwee.
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Black-headed Gull adult E9KF.
April 20, 2010, Starrevaart, Leidschendam, The Netherlands
(52.10N 04.43E)
Photo: Maarten van Kleinwee.
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