Males and females may share the same nest for short times during the breeding season and during cold winter spells squirrels may share a drey to stay warm.
There may be one, or occasionally two, entrance/exit holes in a drey, usually close to the bottom and oriented toward the trunk, which keeps rain out.
Squirrels often build more than one in a season, as reserve nests, lest the primary drey be disturbed by predators or overrun by fleas or lice.
Drey sits down and joins him.
Sometimes squirrels build their own dreys and sometimes they occupy a vacant drey that was previously constructed by another tree squirrel, often of a different species.
They are sometimes referred to as drey nests to distinguish them from squirrel cavity nests (also termed dens).
Eastern gray squirrels build a type of nest, known as a drey, in the forks of trees, consisting mainly of dry leaves and twigs.
A drey is almost always at least 20 ft above the ground, and flying squirrels build much higher.
