“Snakes don't have eyelids. Instead, each eye is covered by a clear scale called a brille, which is why snakes can't blink and seem to stare.”

Reference: Smithsonian's National Zoo

More animal facts

The harmless whale shark holds the title of largest fish, with the record being a 59 footer captured in Thailand in 1919.

The anaconda, one of the world's largest snakes, gives birth to its young instead of laying eggs.

The Labrador Retriever has a thick, rounded, tapering "otter tail" that works like a rudder, helping the dog steer while it swims.