Squirrels are members of the rodent family. The most frequently dealt with nuisance squirrel is the Eastern Gray Squirrel and Fox Squirrel. Squirrels are active year-round and arboreal, meaning that they live primarily in trees. They feed on a great variety of foods, such as nuts, seeds, fungi, fruits, and of course the seed in your bird feeder. They store nuts and acorns in holes in the ground. Squirrels breed primarily in late winter and early spring. After about six weeks 2 to 5 young are born, and raised in a nest for about three months. They prefer cavities in trees (or homes), and when cavities aren’t available, they will build a nest out of leaves and twigs high in a tree.