Vicious small frogs that attack with sharp talons and teeth
Giant Killer Frogs are not as big as the more normal sort, but are more vicious. They are only about 1 to 1.5 feet in length, and are not able to use their tongues to ensnare prey; rather, they use their sharp talons and teeth. Due to their camouflage markings they surprise on 1-3 on 1d6. An entire group of these nasty amphibians will attack en-masse, seeking to overwhelm their victims with sheer numbers.
Basic Fantasy Field Guide Omnibus