Anhinga

Anhinga is a relative of cormorants, but it's more ancient-looking than them. Just like the cormorants though, it doesn't have any oil on its skin, so after diving for fish it has to come out and dry out its wings in the sun. It strikes an imposing pose as it does that. Anhingas are also known as snake-birds, and that's because of the way they swim - their bodies are completely submerged in water, so only their thin necks and heads are visible. Females have light necks and heads, males are all-black.