I went looking for something reptilian to fold today (not sure why) and found this little charmer designed by Marc Vigo:

Using a series of rabbit ears on a 2×1 rectangle, you isolate legs, head and tail rather cleverly.

The colour change for the head, eyes and lovely prehensile tail are charming, the cutie little feet are also well proportioned.

This was a fun fold, the resultant chameleon is as true to form as I know, not having ever seen a chameleon in the wild before.