any of various long-legged birds that wade the shallows and marshes for food; esp., any of an order (Ciconiiformes) including the herons, storks, and ibises
See wading bird in American Heritage Dictionary 4
(wāˈdĭng)
noun
A long-legged bird, such as a crane, heron, or stork, that frequents shallow water, especially in search of food. Also called wader.