Brown Vine Snake
Oxybelis aeneus

f16 @ 1/80s, ISO:1250, Nikon D3S w 105mm macro

"Oxybelis aeneus," Wikipedia, the free encyclopedia. Oxybelis aeneus, commonly known as the Mexican vine snake or brown vine snake, is a species of colubrid snake, which is endemic to the Americas. O. aeneus is an extremely slender snake that reaches up to 1.9 metres (6.2 ft) in total length (including a long tail). Its color may vary from gray to brown with a yellow underside.
El Valle de Anton, Panama