The+crotalus.

The crotalus are venenous and large reptiles that live in America, from Southern Canada to Northern Argentina. They are easily recognizable by the characteristic rattle on the tip of the tail. They could measure 2,9 meters long and weigh 9 kg. His head is rather flat and is clearly distinguishable from the neck. The center of the body is surrounded by scales that are arranged in 21 to 29 rows. The background color of this reptiles go from yellowish to greenish, reddish brown and even black colours. In dangerous situations these snakes are often twin and put the neck in an " S" form to attack faster. Their tails emits a warning sound. The poison of these animals is very strong. It d estroys red blood cells and blood vessels to penetrate. That affects the body tissues and circulation. Their bite s are extremely painful and can be fatal to a human. Most of these snakes beats you if you try to hunt them. They are carnivores and they feed on eggs and mouses.