Species:

Stenocercus fimbriatus

Western Leaf Lizard

Madre Selva Biological Station, Loreto, Peru
Western Leaf Lizard (Stenocercus fimbriatus)
These ground-dwelling lizards are amazingly good dead-leaf mimics, and they know it. They sit perfectly still, relying on their camouflage, unless approached very closely. Then they race off a ways and freeze once again. This one is not in full camouflage mode because I managed to catch it and get it to pose for a few moments on a small branch.

Here is a complete list of the herps I saw in the wild on my 2013 MT Amazon Expeditions trip.

Madre Selva Biological Station, Loreto, Peru
Western Leaf Lizard (Stenocercus fimbriatus)
Here's a more typical position, poised in the leaf litter and partly obscured by it.
Madre Selva Biological Station, Loreto, Peru
Western Leaf Lizard (Stenocercus fimbriatus)
Here's another that I managed to catch and pose in the open.
Madre Selva Biological Station, Loreto, Peru
Western Leaf Lizard (Stenocercus fimbriatus)
Western Leaf Lizard (Stenocercus fimbriatus)
Western Leaf Lizard (Stenocercus fimbriatus)
I had good luck with these lizards this year. I saw a number of them either before they ran off, or after they ran just a short distance and then struck a pose of "you can't see me because I am so well-camouflaged".

Here is a complete list of the herps I saw in the wild on my 2014 MT Amazon Expeditions trip.

Madre Selva Biological Station, Loreto, Peru
Western Leaf Lizard (Stenocercus fimbriatus)
Another nicely self-posed little camouflaged lizard.