Natural selection

The deer mouse

These were normally dark colored and found living in the woods. The ones found in the sand hills are lighter

Deer mouse, any of 53 species of small rodents found in a variety of habitats from Alaska and northern Canada southward to western Panama. They have bulging eyes and large ears, weigh from 15 to 110 grams (0.5 to 3.9 ounces), and are 8 to 17 cm (3.1 to 6.7 inches) long. The tail may be shorter than the head and body or strikingly longer, depending on the species.

Classification

Order: Rodentia

Family: Cricetidae

Description: The two species of Peromyscus inhabiting the Adirondacks are similar in appearance, and are not always distinguishable from external characters.

Deer mouse- evolution

The tail may be shorter than the head and body or strikingly longer, depending on the species. All deer mice have soft fur, but it's color varies both between and within species. The fur is nearly white in some populations of cotton mice in the southeastern United States, but it can range from gray through bright buff, brown, reddish brown, and to blackish in P. Melanesian, which inhabits the mountain forests of southern Mexico.

what do most deer mice eat

Food and Feeding Behavior: The omnivorous deer mouse uses its sharp incisors to gnaw through the hard coats and seeds and the chitinous exoskeleton of beetles. Small invertebrates such as insects, earthworms, and snails form an important part of the summer diet.


Fungi, fruit, and even carrion are other foods. Deer mice cache food, especially seeds, in holes in the ground, in tree cavities, and even in bird nests, storing up to 0.6 L (1 pt) in each location for later use. In spite of autumn fat deposition and food hoarding, winter starvation is a chief cause of mortality.