RATTLESNAKES

Rattlesnakes are the most poisonous animals in the united states. There are more than 12 different types. Did you know that rattlesnakes are only found on the western hemisphere? And the rattlesnakes fangs have to fold back when the mouth is closed because the fangs are so long? And that the rattles are called buttons every time the snake sheds its skin it grows a button. Maybe I'll study rattlesnakes when I grow up.