There have been five snakes that have appeared in Happy Tree Friends, almost all of which involved in the killing or injuring of characters. Even though the snakes are non-anthropomorphic animals, they all seem to show a few small anthropomorphic traits. This trait, like when they are seen upset, the green snake, the rattlesnake, and the cobra, and the smoochie snake because it wants a meal, all frown which real snakes cannot do, and the green snake's mouth drops at the corners to show it's angry, which is another thing a snake cannot do. All of the snakes appear to be very aggressive, however, the Cobra's attack was in self defense, as it bit Toothy and "ran" away. the Rattlesnake also appeared to be very defensive. The Green Snake is a lot more offensive, as it attacks a paralyzed Petuni