MNN Galleries

7 tiny but deadly creatures

By: Bryan Nelson on Sept. 25, 2013, 5:43 p.m.
A handful of poisonous dart frogs

Photo: worldswildlifewonders/Shutterstock

2 of 9

Poison dart frogs

Bright colors in nature are often a sign of danger, and these flamboyant little frogs are no exception. The potent toxin secreted from their skin has been used by indigenous peoples in Central and South America to poison the tips of blowdarts.

The most deadly species, the golden poison frog, carries enough toxin on average to kill 10 to 20 men. That's impressive for a creature that only grows to about 1.5 inches in size.