The Anhinga is a fish-eating waterbird. When swimming, it may show only its long neck and head above the surface.
It has a small head on a very long, snake-like neck. Males are dark greenish black with silvery wing feathers; females have a lighter brown head and neck.
Its waterlogged plumage reduces buoyancy, helping it sink and approach fish underwater before spearing them with its bill. After emerging, it spreads its wings to dry.
Both parents incubate the eggs for 25–30 days before they hatch.
An extinction-risk assessment has not been added yet.