the wood frog can hold its pee for as long as 8 months.

 before refrigertaors, people in russia and finland kept live brown frogs in their milk. the frog's secretions killed bacteria, keeping the milk safe to drink.

in case you don't know, you can't catch warts from a toad or a frog.

microhyla nepenthicola is one of the tiniest vertebrates on earth. these frogs are so tiny that, even when full grown, 30 or more of them can comfortably sit on a penny.

the african frog trichobatrachus is the most bad-ass amphibian in the world. if you grab one, it will break a bone in one of its toes, push the sharp, splintered bone through its own skin, and stab you with it.

horned frogs (also called 'pacman frogs') have mouths that are half the size of their entire bodies. they eat each other, mice, birds, rats - pretty much anything that goes by. and their larva can scream.

the flying vampire frog of southern vietnam has tadpoles that are born with long, black fangs. they use them to eat their mother's unfertilized eggs. as if that wasn't strange enough, they have huge webbed hands and feet, which they use to glide from tree to tree.