Shrews are mouse-sized mammals that eat insects for a living.
Right lower jaw of a fossil shrew from the Dove Spring Formation of Red Rock Canyon. Scale line equals 1 mm or about 1/25 of an inch.
A modern shrew (illustration adopted from "World Guide to Mammals" Greenwich House 1983).
Did you know?
The fossils of prehistoric animals during the past 7-12 million years ago can be found entombed in the sediments, including extinct elephants, rhinos, three-toed horses, giraffe-like camels, saber-toothed cats, and bone-crushing dogs. There are also fascinating small creatures such as ancestral skunks, alligator lizards, and shrews.