Did You Know?
When snakes are born with two heads they fight each other for food.
Scientists have named a rare two-headed snake Double Dave after it was found in a forest in the US state of New Jersey.
The baby timber rattlesnake was discovered last month by environmentalists from the Herpetological Associates group, who study endangered and threatened reptiles.
The name Double Dave was coined because it was discovered by the environmentalist Dave Schneider and his colleague, also called Dave. The venomous pit viper, which is 20-25cm (8-10 inches) long, has two fully formed heads, meaning it has four working eyes and two flickering tongues.
Schneider explained that Double Dave’s two heads worked independently of each other, and it would be difficult for such a creature to survive in the wild, because the condition meant it was slow-moving and could be easily picked off by prey.
Two-headed snakes often have one head that is slightly more developed than the other, and the heads have been known to fight each other over food, not realising that whatever they eat is heading to the same digestive system
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