Monday, 9 November 2009

Caspian Gull (Larus cachinnans), ad, 9.11.2009, Følle Bund, Rønde

This Caspian Gull has relative slender and long bill without pronounced gonys angle, small darkish eye situated closer to the flat forehead than in argentatus, distinctive head shape with angled profile, relative small white apical spots on exposed primaries and it has a cachinnans-like jizz with small head, flat back and long slim elongated rear. Additionally the upperparts are slightly darker than nearby argentatus.

Kaspisk Måge - Larus cachinnans - Caspian Gull

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