A water shrew is an insectivore no bigger than a thumb but don't let its size fool you. A water shrew is a tiny insectivore no bigger than a human thumb. Because of poor eyesight, they must rely on a ...

A water shrew is a tiny insectivore no bigger than a human thumb. Because of poor eyesight, they must rely on a complex hunting strategy. - [Narrator] Water shrews are the cheetahs of the wetlands.