Nests

Gray squirrels use three different types of nest. Summer Dreys and Winter Dreys are conspicuous constructions of leaves and twigs mounted high in treetops. Winter Dreys are made in layers. The outer layer consists of interwoven twigs while an inner layer is built up with softer materials consisting of bark, leaves, moss, fur, grass, and “found” materials. They are resistant to winter winds and provide protection where den sites may be in short supply. Summer Dreys are less elaborate and provide minimal protection from the elements. They are less likely to be used for litters. Tree dens in hollow trees are the preferred nest sites for raising young.