wintering heuglin gulls (larus heuglini

bandar abbas iran january wintering gull heuglin gulls larus heuglini old young birds shore strait hormuz kelp pigeon fuscus lesser blackbacked herring argentatus animal systematics aviary beak bird colony black backed wing breeding plumage classification family feather graceful head mew nearwater nesting place reproduction animals sea seagull seashore season white wild wildlife winter caspian cachinnans blackheaded watching