The Common Gull breeds in northern Eurasia and northwest America. The above two photos are by Dr Harsha Vardhan Reddy.
In North America it is known as the Mew Gull (also an Old English variant).
The above two photos of Common Gulls are also by Dr Harsha Vardhan Reddy.
The Common Gull has a silver-grey back and wings with black wing-tips and white "mirrors".
It is much smaller than the Herring Gull and has pale greeny-yellow legs.
It sometimes has a black ring on its beak and its head is streaky grey in winter.
Its "Common" name derives from flocks that feed on "common" land and sports fields; it is not the most common of gulls.
Sub-adults have grey legs
Common Gull with Black-headed Gull
The wing mirrors