How are snail and frog legs cooked?

Snails are traditionally taken out of their shells, cooked in garlic butter then put back in the shell along with extra garlic butter and parsley.

Frog legs are traditionally fried with garlic butter and parsley.

Snails are almost invariably cooked like this.

On the other hand, frog legs recipes are very diverse (frog curry, frog legs in tomato&basil sauce, etc.).