american white pelicans interacting near gulls

american animal aves big bill bird black blue breeding competing conflict details disagreement erythrorhynchos exchange eyes feathers fight gulls hard head heavy interacting interaction lake lakeshore large long lovely mating mouth nature orange pelecanidae pelecaniformes pelecanus pelican pelicans plumage plump pouch pretty pure purity rights rock season squabble squabbling standing stone throat turned water waterbird white wildlife wings yellow