Complete Animal Encyclopedia- Help

For anyone who has been stuck in a game, this is where I now find myself. If anyone can help...I have all trophies and every animal on the field guide except the very last one with the crocodile and the scarab and lizards. I am missing the very last animal on the bottom row. Can anyone tell me what animal I'm suppose to be looking for (if you know where the region...duma steppe, the swamp, etc it is to be found...i appreciate that as well)....please please help.....this will be my first platinum[b][/b]

The rainbow lizard is found in Lake Hero, at the bottom of the left side of the really big hill you can climb. They will just be laying on rocks. If you need to know the nile crocodile is in the swamp, and the turtle is in chora gorge. I can't find the chameleon though, if someone knows. Thanks.