When trapping squirrels, you have to consider the time of the breeding season. In most areas, female gray and fox squirrels give birth to a litter of three to four young between late January and late February, often with a second litter in mid to late summer. The young squirrels are weaned at eight to nine weeks and begin exploring outside the nest. Flying squirrel young are born in March to April with a second litter in mid summer and are weaned in six to eight weeks.
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