bird - warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

water bird, waterbird, waterfowl - freshwater aquatic bird

swan - stately heavy-bodied aquatic bird with very long neck and usually white plumage as adult

wader, wading bird - any of many long-legged birds that wade in water in search of food

gallinule, swamphen, water hen, marsh hen - any of various small aquatic birds of the genus Gallinula distinguished from rails by a frontal shield and a resemblance to domestic hens

sea bird, seabird, seafowl - a bird that frequents coastal waters and the open ocean: gulls; pelicans; gannets; cormorants; albatrosses; petrels; etc.