During the wet and hot months of October through April, snakes are more commonly seen. One of the most fear causing animals is the tropical rattlesnake (Crotalus durissus terrificus, Cascavel). This pit viper advertises itself by a loud shaking of it´s rattle at the end of the tail (see and listen to a red rattlesnake here!).
Their diet consists of small rodents and birds. Although encounters like these are rare, one should be cautious when walking around in the wild. However, rattlesnakes rarely bite unless provoked or threatened; and if treated promptly, the bites are rarely fatal.