aquatic bird

The term water bird, alternatively waterbird or aquatic bird (not to be confused with wading birds), is used to refer to birds that live on or around water. In some definitions, the term is especially applied to birds in freshwater habitats, though others make no distinction from birds that inhabit marine environments. Also, some water birds are more terrestrial or aquatic than others, 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. https://en.wikipedia.org/wiki/Water_bird