The Golden Poison Dart Frog is tiny, adorable, and quite deadly. Just one frog is about the size of the end of your thumb, and contains enough neurotoxin to kill ten men! A dose that equals about two grains of salt is enough to kill adult humans. This is why some Amazonian tribes have used their venom to coat the tips of their hunting darts. Just a graze will kill you good and dead within minutes! A good rule: If it's a frog, and it's yellow, blue, green, or red, don't touch it.