[1] The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature: Rodents make up the largest order of mammals, with over 40% of mammalian species.
They have two incisors in the upper and lower jaw which grow continually and must be kept short by gnawing.
The order Erinaceomorpha contains a single family, Erinaceidae, which comprise the hedgehogs and gymnures.
The shrews and solenodons closely resemble mice while the moles are stout-bodied burrowers.
They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.