This is the most poisonous snake of North America. The snake became rings on the tip of one of its Poonch is easily identifiable. When it rings, it shakes your Poonch, do sound like rattles. Hence the rattle snake has had. The Viper 2/3 part of its total length of which is too much to be wise. These snakes are very sound cranky. The biggest feature of this snake their children, are more dangerous than the elders. Because there is poison in children than adults. Large decreases with the poison. Hemotoksik poison is found in the body. Human tissues from the effects of the poison start to finish. Blood Cloting is closed. Within 10 15 minutes after cutting its Anteedot be given a chance to avoid some may be so, otherwise death is certain.