Their plumage is somewhat permeable, like that of cormorants, and they spread their wings to dry after diving.
They have long, broad wings with 11 primary and about 20 secondary feathers.
They are large, black-and-white, or completely black, with long wings and deeply forked tails. They do not swim or walk and cannot take off from a flat surface.
Having the largest wingspan-to-body-weight ratio of any bird, they are essentially aerial, able to stay aloft for more than a week.
Family: Anhingidae Darters are often called "snake-birds" because of their long thin neck, which gives a snake-like appearance when they swim with their bodies submerged.
The males have black and dark-brown plumage, an erectile crest on the nape, and a larger bill than the female.