Anhinga's feathers are not as waterproof as some other waterbirds. This makes them less buoyant and enables them to dive deeper in search of food. The birds' feathers can become waterlogged, however, and Anhinga are often seen perched with their wings outstretched to dry.

(Photograph shot on assignment for, but not published in, "South to the Keys," January/February 1999, National Geographic Traveler magazine)