Pink flamingo filtering food with beak from shallow muddy water in the zoo of Grand Seoul Park

phoenicopterus ruber phoenicopteridae flamingo wildlife fauna zoo group flock pink plumage animal leg environment larval bird muddy crustaceans nature standing beak algae feet sweep seoul grand park wild sunny day long upsidedown shallow sucking water background reddish neck food stir up exotic filtering tropical tilt surface bills lower stamp curved webbed sunshine american white