Common Gull amongst Black-headed Gulls

Common Gull amongst Black-headed Gulls

Observation - Common Gull amongst Black-headed Gulls - UK and Ireland. Description: Slightly larger than Black-headed Gulls and has darker mantle. Rounded, gentle, streaked head, with greenish bill

Slightly larger than Black-headed Gulls and has darker mantle. Rounded, "gentle", streaked head, with greenish bill