When the Black Rain Frog feels threatened, it blows up like a little balloon to intimidate predators. Swollen, angry, and ready for battle, these frogs couldn’t look more like pissed-off avocados if they tried. Presumably, and hopefully, predators don’t find them nearly as cute as we do.To make them even cuter, the male Black Rain Frogs produce a chirping sound which sounds like when you repeatedly squeeze a rubber chicken or other squeaky dog-toy. They make this call to deter predators, but we can’t help but find it more adorable than intimidating.