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Black-headed Gull Identification
Breeding adult
Breeding adults in flight have a white leading edge that contrasts with dark primaries.
© Ian Davies | Macaulay LibraryNorrbottens län [SE-25], June 19, 2015Flock
In winter, found primarily along seacoasts, estuaries, and bays often in flocks.
© Josip Turkalj | Macaulay LibraryGrad Zagreb, December 18, 2016Adult Description
- Small gull.
- White triangle in outer part of wing.
- Blackish under tip of wing.
- Back pale gray.
- Underparts white.
- Head dark brown during breeding.
- Dark spot behind eyes in winter.
Immature Description
Juvenile with much brown on head, neck, and back, a dark bar across the wing, and a black tail tip. Immature similar to nonbreeding adult, but with brownish black bar across the base of the wing, much black in the outer wing, and a black band across the tip of the tail. In first breeding plumage the black head is partly mottled with white.Relative Size
between crow and gooseMeasurements
- Both Sexes
- Length: 13.4-14.6 in (34-37 cm)
- Weight: 6.7-14.1 oz (190-400 g)
- Wingspan: 39.4-43.3 in (100-110 cm)
