Homes and other structures provide many of the requirements mice have for living, such as food and water, warmth, and shelter from predators. They invade seeking these requirements, often in response to falling temperatures that signal the onset of winter. Once inside, mice build nests in undisturbed areas away from light, such as attics, pantries, and garages and within walls. Mice often seek out and invade stored food items within the home. House mice consume a wide variety of foods, such as fruits, nuts, seeds, insects, grains, discarded foods, and stored pantry items. Deer mice also consume many food sources, such as beetles, earthworms, snails, seeds, fruit, and fungi and are especially attracted to homes with large insect populations or easily raided pantry items.