Ahuizotl

The Ahuizotl resembles a dog-monkey hybrid with a hand on the end of its long tail. It is an arboreal ambusher, and apparently amphibious as well, as it sometimes attacks from pools. They are active at any time of day or night, and have been known to sneak into homes after dark to carry people off.
Ahuizotl seem to kidnap humans. The ones that live underwater drown them, it’s true, but the people that are drawn up into the trees are never heard from again. Bodies, bones or even clothing are never found. 
No one knows for sure what happens, or why.
They attack from above, over a jungle trail. There are often more than one of them, and a whole party may be attacked simultaneously. Those that live underwater also attack by surprise, the tail-hand coming out and pulling the victim in — Contest of ST
Category:Myth