Rattlesnakes Learn More

There really is such a thing as a rattleless rattlesnake—it is called the Santa Catalina rattlesnake, and it’s found only on the island of Santa Catalina. Commonly, rattlesnakes use their rattles to warn away animals that are too big for them to eat. Scientists think that over time, this snake lost its rattle because there are no hoofed animals on the island that it would need to warn away.

  • More To Learn More

    Bats

    Bats

    Bats don’t slip from their sleeping roosts because they can lock their talons onto the branches where they sleep. The

    duck

    Ducks

    Unlike most ducks, wood ducks nest in tree cavities—for instance, you might find one in an old woodpecker hole! The

    panda carrying cub in her mouth

    Pandas

    A wild female panda may have five to eight offspring in her lifetime, but she will only give birth once every other year.