Squirrels

Squirrels are an abundant species worldwide. Cambridge residents may encounter squirrels more frequently during their two annual mating seasons, one in late January/February and another in late May/June. Following a 44-day gestation, the first litter of three to five young is born in March or early April, and the second in August or September. The eyes of the young open at four to five weeks and they’re weaned at 10 or 12 weeks. The first litter usually remains with the mother until the second litter is born in late summer.

North America is home to a wide variety of tree squirrels and an even larger number of ground squirrels. The fox squirrel and eastern and western gray squirrels are the species most commonly involved in conflicts with humans. Highly adaptable creatures, squirrels have adjusted well to the urban and suburban landscape. Squirrels primarily consume plant matter, and their diet varies with the seasons. They typically eat and store acorns and other nuts underground, which provide them food for the winter. Spring flowers and growing buds are also eaten as the weather warms. In the summer, squirrels often eat fruits and berries.

If you encounter an injured squirrel, please contact Cambridge Animal Commission at 617-349-4376 or animalcommission@cambridgema.gov.

Living with Squirrels Fact Sheet