Field Guide

Mammals

Showing 1 - 10 of 20 results
Media
Photo of a beaver half in water
Species Types
Scientific Name
Castor canadensis
Description
The American beaver is a semiaquatic rodent distinguished by its large size, webbed hind feet, and large, horizontally flattened tail covered with leathery scales.
Media
Image of mink
Species Types
Scientific Name
Neovison vison
Description
The American mink is a semiaquatic predator and a member of the weasel family. It is famous for its durable, soft, valuable fur.
Media
Photograph of a muskrat standing on grass
Species Types
Scientific Name
Ondatra zibethicus
Description
The common muskrat is one of the most abundant commercial furbearers in Missouri. This semiaquatic rodent has benefited from the construction of thousands of farm ponds throughout the state.
Media
Image of an eastern chipmunk
Species Types
Scientific Name
Tamias striatus
Description
Chipmunks are sleek, attractive, active ground-dwelling squirrels. They live in tunnels but are generally out during the day, making them one of the few mammals that people can enjoy watching.
Media
Image of a gray squirrel
Species Types
Scientific Name
Sciurus carolinensis and Sciurus niger
Description
The eastern gray squirrel and eastern fox squirrel are both very common in Missouri. Their names describe their general coat color: the first is grayish, the other a foxy red.
Media
eastern mole
Species Types
Scientific Name
Scalopus aquaticus
Description
Eastern moles are plush-furred, large-handed critters infamous for disfiguring lawns as they tunnel belowground hunting for grubs and cutworms — many of which are also dreaded by landscapers!
Media
Collared, grayish-tan wolf in open field
Species Types
Scientific Name
Canis lupus
Description
The gray wolf originally ranged throughout Missouri, but with settlement the species was gradually exterminated. While there is no evidence of a breeding population in the state, wolves are listed as a protected species in Missouri, and they occasionally wander into Missouri from northern states.
Media
Photo of least weasel
Species Types
Scientific Name
Mustela nivalis
Description
This mouse-sized weasel is found only in Missouri’s northern counties, and abundance varies locally and seasonally, depending on fluctuating rodent numbers—their favorite food.
Media
Photo of a little brown myotis hanging from cave wall with lesions on its wrist.
Species Types
Scientific Name
Myotis lucifugus
Description
The little brown myotis (little brown bat) is one of our most common bats, but populations are declining. White-nose syndrome has taken a heavy toll in northeastern states. This species is now listed as vulnerable across its range.
Media
Photo of long-tailed weasel
Species Types
Scientific Name
Mustela frenata
Description
Long-tailed weasels are small but voracious predators. They are rare in our state but are most common in the south-central and southwestern portions. In summer, they are brown with yellow beneath. In winter their fur is paler or white. The tail has a black tip.
See Also

About Mammals in Missouri

More than 70 species of wild mammals live in Missouri: opossums; shrews and moles; bats; rabbits; woodchuck, squirrels, beaver, mice, voles, and other rodents; coyote, foxes, bear, raccoon, weasels, otter, mink, skunks, bobcat, and other carnivores; deer and elk; and more. Most of us recognize mammals easily — they have fur, are warm-blooded, nurse their young, and breathe air.