David Kenny / Getty Images
You can find the beautiful variable poison frog (also known as the spash-back poison frog) living in the rainforest of Ecuador and Peru. But don't try looking for it — or at least if you do look, don't touch. Small enough to be called thumbnail frogs, variable poison frogs feed primarily on bromeliad plants.16 The color of the frog's "splashed" back can range from lemon yellow to vivid orange to bright red, and sometimes the color takes up the entire back, with little or no black remaining except for the legs and underside.