According to some ?? can possibly be a frog. I know the ???? in ?????? and the ???”? both say that the carcass of a frog is not ?????, but if you want to be ????? (as everyone today wants to be) then ?? can be any reptile or amphibian.
Fun fact: the Yiddish word for frog is jabba. You are what you eat. Star Wars fans will appreciate the joke.