The first sign of squirrels in the attic is the scurrying or scratching usually in the ceiling or eaves, during the early morning or evening hours. Squirrels love to live in attics. The female squirrels view your attic as a big, dry, safe tree nest! The females give birth twice a year - in late winter and late summer, and their young grow quickly and start running around in your attic. Peak times for activity are February/March and September/October, although they sometimes spend all year in an attic, and we get calls about them 12 months out of the year. They are very capable animals, and they can climb almost any surface and jump very far, and they have no problem finding the entry points into your attic.