How Do Squirrels Spend the Winter? Revealing the Ways Squirrels Survive Winter

Squirrels are very cute small animals, with big fluffy tails and two large front teeth, and they hold pine cones to nibble on. So, how do squirrels spend the winter?

1. How do squirrels spend the winter?

Before winter arrives, squirrels store large amounts of winter food in their burrows. When the weather turns cold, they shelter from the cold in deep burrows, and several squirrels may even share the same nest to maintain body temperature. Once the weather warms up a little, they come out again to move about and forage.

2. What are the living habits of squirrels?

1. Feeding behavior

Squirrels spend 70%-80% of their time on foraging activities, and tend to forage and store food in coniferous forests. In autumn, squirrels scatter-store nuts on the ground and store fungi on branches. Autumn food storing helps squirrels survive the winter and reproduce the following year. The selection of microhabitats for food storing and the mechanisms of retrieving stored food have been studied in depth, becoming a current hotspot in domestic squirrel ecology research

2. Social behavior

Squirrels spend most of their time living alone. Social structure is built on dominance hierarchies among individuals of the same sex and between the sexes, with dominant individuals usually larger than others. Rank dominance is usually only expressed during the breeding season. Squirrels use urine and secretions from the mandibular gland, smeared on tree trunks and branches, to mark their home range. The size of a squirrel's home range is related to habitat quality, season, sexual activity and food abundance; home range size varies greatly among different distribution areas, but males' home ranges are usually larger than females', and dominant individuals' home ranges are larger than those of subordinate individuals. In areas with abundant food, home ranges may overlap to a small extent.

3. Nesting behavior

Squirrels live in nests, and may also use tree holes and bird nests. Each individual usually occupies 2-3 nests at the same time. Because fir branches and leaves are relatively denser than those of pines, in planted forests squirrels usually choose to build their nests in fir trees. Nest site selection in natural forests has not been reported. Most nests are built on branches 8-16 m above the ground, close to the trunk or at branch forks, and fall into two types: rest nests used during the day and sleeping nests used at night. They are usually spherical, about 30 cm in diameter, with the outer layer made of twigs, pine needles and leaves, and an inner diameter of about 12-16 cm, lined with soft materials such as moss, leaves, pine needles, dry grass and bark.

4. Reproductive behavior

The reproductive status of squirrels is closely related to food availability. They can give birth twice a year, mating in February and March and in July and August respectively, with a gestation period of about 38-39 days. The young are nursed by the female alone, and the nursing period exceeds 10 weeks.

5. Migration and dispersal

Squirrels do not show obvious migration, but they do exhibit short-distance dispersal behavior, including dispersal outward from wintering grounds and from their birthplace. Local competition determines the dispersal distance. Studies show that different sexes differ in dispersal season: most males disperse in spring, while females usually disperse in autumn. Female dispersal is influenced by food, while male dispersal depends on the distribution of females.

Although most squirrels do not hibernate, a small number of ground squirrels do hibernate.