Water bird

A general term (not a classification) for any bird that lives part of its life in or around water, especially the swimmers, divers and waders.

Examples

 * Pelicans,
 * Anhingas,
 * Cormorants,
 * Boobies,
 * Gannets,
 * Frigatebirds,
 * All marsh birds,
 * The waterfowl,
 * The shorebirds,
 * And most members of the gull and the auk family

The true seabirds, are usually those that live most their lives at sea (pelagic).