Jararaca, rattlesnakes, and Southern American bushmaster are very well-known and feared poisonous snakes in Brazil. It is important to know where to find them, how to identify them, and how to avoid accidents.

Many frogs, toads, and tree frogs are known to be poisonous, but so far only two species worldwide have been recognized as venomous.

The bright colors of the poison dart frog warn predators to stay away. Eating them can be fatal.