A flock of migratory birds, black-headed seagulls are standing in the murky and muddy waters of the estuarine waters of Bangphu in Samut Prakan in Thailand, while some are flying away

seagulls blackheaded gull chroicocephalus ridibundus palearctic migratory chocolatebrown head palegrey body wings feathers red bill red legs birds salt pans estuaries flight mud fish pond animals wildlife nature coastal area marshes lakes pelagic species colony brownhooded gull chroicocephalus maculipennis gulls spotted wings brown head red beak bangpho thailand asia southeast asia natural habitat freshwater lakes intertidal marshes river banks open fields brownhooded gulls common gull larus canus sea mew breeding plumage gulls in thailand migratory gulls murky waters