They like mixed habitats, which means that they often live around the edge of two or more habitats. For example, deer might live at forest edges adjacent to mountains, foothills and water sources. Squirrel Squirrels are often considered herbivores because they primarily feed on seeds, cones, nuts, fruits and mushrooms. However, they also eat insects, so they are really omnivores. Squirrels live in forested areas, either in holes they have made in the ground, in trees where they build nests, or in abandoned holes in trees.
Squirrels tend to collect food and hide it for times when food is scarce, as in winter.
Squirrels are a favourite food for many omnivores and carnivores and therefore must constantly move quickly and hide well so they do not get caught. Like squirrels, mice are a favourite food of carnivores. Mice eat seeds, plants and insects, though they are often considered herbivores. They live in nests that are built beneath rocks and logs, in burrows or in trees. They live in a variety of different habitats because their small size allows them to survive wherever there is enough vegetation for cover.