Rattlesnakes are snakes found in "The Cat in the Hat Knows a Lot About That".
Rattlesnakes are slender and tan. When they're born, they're born alive unlike other snakes, and they don't have rattles. Everytime a rattler sheds its skin, it grows a rattle on its tail.
In Real Life
Rattlesnakes love to eat rodents and birds. When a rattlesnake catches a bird in its venom, it hangs on so the bird won't get away. Rattlesnakes bite only if they get frightened or stepped on.
Gallery of Rattlesnakes from the TV Show