Boyd’s Bible Dictionary:
(ground lion). A species of lizard, arboreal in habit. But the word thus translated implies a frog (Lev. 11:30).
Concise Bible Dictionary:
The Hebrew word is koach (Lev. 11:30), and is thought to refer to a species of lizard. There are chameleons in Palestine, but they are unfit for food, whereas the lizards are eaten. The lizard was classed among the unclean animals
Chameleon