A second litter can occur in mid summer, if there is an adequate food supply. A female squirrel will choose the strongest male during mating season, but is unlikely to breed with that male again. This is natures way of reducing inbreeding, and to preserve the species. A baby squirrel weighs approximately one ounce at birth, and is about one inch long. They do not have hair or teeth, and are virtually blind for the first six to eight weeks.
Gray squirrels come in many colors.
Shades of gray are the most common followed by shades of brown. There are also pure white and pure black squirrels, but both are variations of the gray squirrel. The common Red squirrel can have an all black coat. While the Kaibab squirrel has a black body with a white tail. Both are found in coniferous forests.