Hi Autumn! I don't believe I've ever heard my African Dwarf frogs croak, only my green tree frogs. It is really fun listening to different frog calls (I have a DVD with all frog and toad calls in North America). By the way, I've never seen a wild big cat before, but I'm hoping to see a wild mountain lion one day because I live in Arizona (the only wild cats I've seen are bobcats). Nice to meet you!