Snake bird

http://en.wikipedia.org/wiki/Darter

i checked but it does not have the colors of darter: The males have black and dark brown plumage, a short erectile crest on the nape and a larger bill than the female. The females have a much paler plumage, especially on the neck and underparts, and are a bit larger overall. Both have grey stippling on long scapulars and upper wing coverts. The sharply pointed bill has serrated edges, a desmognathous palate and no external nostrils. The darters have completely webbed feet, and their legs are short and set far back on the body.

http://en.wikipedia.org/wiki/Pinnated_Bittern

I think pinnated Bittern is correct

Beautiful Bird!

tiger herron? looks like this one but I may be wrong: http://www.projectnoah.org/spottings/6316708

This guy reminded me of the American Bittern so I looked up Bittern in Peru and it looks like the Pinnated Bittern is our Peruvian cousin.