Black-headed Gulls

Black-headed Gulls

Observation - Black-headed Gulls - UK and Ireland. Description: Pretty certain that these are Black-headed Gulls in winter plumage, but haven't seen the brownish colouration on the wings before. Are these younger birds? Seen around the River Arun and one of its feeder streams, Arundel.

Pretty certain that these are Black-headed Gulls in winter plumage, but haven't seen the brownish colouration on the wings before. Are these younger birds? Seen around the River Arun and one of its feeder streams, Arundel.