Bonaparte's gull  (Larus philadelphia)

Bonaparte's gull chicks

© Craig Almack

Bonaparte's gull on water with chick

© Craig Almack

Young Bonaparte's gull

© Martin W. Grosnick / www.ardea.com

Young Bonaparte's gull swimming

© Ralph Reinhold / Animals Animals

Bonaparte's gull in breeding plumage

© Melvin Grey / www.nhpa.co.uk

Bonaparte's gull in non-breeding plumage

© Glenn Bartley / www.nhpa.co.uk

Bonaparte's gull feeding on crab

© CC Lockwood / Animals Animals

Bonaparte's gull preening

© Donna Ikenberry / Animals Animals

Bonaparte's gull taking off from water

© Tom Vezo / naturepl.com

Bonaparte's gull in flight

© Malcolm Schuyl / www.flpa-images.co.uk

Bonaparte's gull flock in flight

© Michael Sacca / Animals Animals

Bonaparte's gulls displaying

© Ralph Hocken

Bonaparte's gull on nest in conifer tree

© Tom Vezo / naturepl.com