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Slender-billed Gull - Larus genei
Adults


Slender-billed Gulls: adults, Israel March 2012

Similar to Black-headed Gull in several respects; small, pale grey above and red bill and legs

Note the long slender deep, dark red bill, slightly blacker towards the tip. The head is unmarked white, not dark ear covert spot. Eye is rather large for a small gull and darkish amber.

The upper-parts are pale grey and there is a lack of tertial crescent. Primaries are brownish-black and lack white tips and mirrors.

Legs are scarlet red.

There is a discernable pinkish blush to the under-parts to some birds
This bird has an almost black looking bill. The head is small with low sloping forehead and the neck is long and slender.

Note the white leading edge to the primaries.
Slender-billed Gulls; adult?, Ma'agan Mikhael, Israel March 2012

Wing pattern similar to Black-headed Gull: white outer primaries with black tips creating a white wedge on the outer wing and a black trailing edge.

The inner primaries show distinct dark diffuse outer webs and pale grey tongues and the tips to the outer primary coverts are dark.

The diffuse outer edges of the inner primaries and the dusky tipped inner primary tips would suggest this is a second-winter bird than a full adult
Slender-billed Gulls; adult, KM20 Salt Pand, Arava, Israel March 2013

Wing pattern similar to Black-headed Gull: white outer primaries with black tips creating a white wedge on the outer wing and a black trailing edge.

The inner primaries show distinct dark diffuse outer webs and pale grey tongues and the tips to the outer primary coverts are dark. Unlike the bird above, which is probably a second year, this bird does not show the dark diffuse edges and tips to the inner primaries and primary coverts.