any of various gruiform marsh birds (family Rallidae) that both swim and wade; esp., the moorhen
See gallinule in American Heritage Dictionary 4
(gălˈə-no͞olˌ, -nyo͞olˌ)
noun
Any of various wading and swimming birds of the family Rallidae, frequenting swampy regions and characteristically having dark iridescent plumage and a red bill tipped with yellow.