Female Fox Squirrel Behavior. Generally, fox squirrels are not gregarious, although they come together during the breeding season when females are in estrus. Squirrels living in the west are thought to be smaller.
Males can be observed nesting together during winter months.
Others consider them to be quite an annoyance. Fox squirrels average 3 pups per litter. Fox squirrels can mate all year long; At the time of birth, baby fox squirrel was born without hair, blind, and helpless.