Water bird

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Water birds
Video from the Danube River in Vienna (2014)

The term water bird, alternatively waterbird or aquatic bird, is used to refer to birds that live on or around water. In some definitions, the term is especially applied to birds in freshwater ecosystems, though others make no distinction from seabirds that inhabit marine environments. Also, some water birds (e.g. wading birds) are more terrestrial while others (e.g. waterfowls) are more aquatic, and their adaptations will vary depending on their environment. These adaptations include webbed feet, bills, and legs adapted to feed in the water, and the ability to dive from the surface or the air to catch prey in water.

The term aquatic bird is sometimes also used in this context. A related term that has a narrower meaning is waterfowl. Some piscivorous birds of prey, such as ospreys and sea eagles, hunt aquatic prey but do not stay in water for long and lives predominantly over dry land, and are not considered water birds. The term waterbird is also used in the context of conservation to refer to any birds that inhabit or depend on bodies of water or wetland areas. Examples of this use include the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) and the Wallnau Waterbird Reserve.

A Yellow-billed Loon/Diver (Gavia adamsii) swimming on a lake in the northern area of Alaska, USA.

Some examples of water birds are:

Pelecanus occidentalis, Tortuga Bay, Island of Santa Cruz, Galápagos