My Saturday Bird this week is the Black-headed Gull (Chroicocephalus ridibundus), a small gull that breeds in much of the Palearctic.
The birds in the photo are winter plumage adults who lost their dark head feathers in the autumn. They’re standing in a shallow section of Hurleston Reservoir near Nantwich in southern Cheshire, England, a lot of them are preening.
In the 1990s Hurleston Reservoir was the location of a large winter gull roost that included thousands of Black-headed Gulls.
