The Black-headed Gull youngster has been busy flexing its wing muscles today and showing nicely the developing flight feathers. The precise pattern of the primaries, secondaries, tertials, greater primary coverts and greater secondary coverts can all be seen in the pictures below. The young bird is becoming more adventurous and is already showing the inherent squabbling that it so characteristic of Black-headed Gulls within the breeding colony. See pictures below.
Exercising the wing muscles
Showing the primaries, secondaries and so on……….
Two strange adults stray close to the nest and are soon seen off