Anhinga

Meet the Anhinga (Anhinga anhinga).  According to Wikipedia, the word anhinga comes from the Brazilian Tupi language and means devil bird or snake bird.  When you see this bird in the water, the body is usually submerged, leaving just the long snake-like neck to view.

This bird was at the Venice, Florida, rookery pond.  I could be wrong here, but it looks like another bird has crapped on its tail.