A snake's juvenile coloration may differ greatly from its adult coloration. Snakes have no eyelids and thus cannot blink their eyes. Most snakes have limited eyesight and can only see prey if it moves. Others, such as vine snakes, are more visually orientated. Most snakes can open their mouths very wide because their jaws are only loosely connected to each other.
Some snakes can swallow animals almost as large as they are.
The record books indicate that an African Rock Python, weighing no more than 140 pounds, swallowed an animal that weighed more than 130 pounds. The King Cobra is the largest of all the venomous snakes, growing to a length of 12 to 14 feet, with a record size of over 18 feet recorded. The Gaboon Viper has the longest fangs of any venomous snake-as much as two inches long. Snakes, like other reptiles, are cold blooded which means the temperature of their bodies depends on the temperature of the air. Some snakes give birth to live young, while others lay eggs from which the young hatch later.