occurs between mid-February to mid-April, though it is delayed at higher latitudes. Prior to copulating, the males' testicles swell during the January–February period, with maximum size being attained in March. Males during this period will cover much ground in their search for females, sometimes covering per night. When a male locates a female, he will approach her from the rear and lick her genitals, then bite her on the nape before copulating. A single male may have a harem of several females, which he mates with and defends against other males for a period of about 35 days. Once the mating period has finished, the impregnated females confine themselves to their dens, while the males attempt to rebuild their fat reserves. The gestation period lasts around 59–77 days, with kits being born at about mid-May to early June. Litters generally consist of 2–12 kits, with the average being five or six, though a litter of 18 is known from Pennsylvania. Kits are born blind and sparsely furred, weighing 25–40 grams. The eyes open after around three weeks, and are weaned after 42–56 days. Although their musk is still undeveloped, kits of this age will instinctively assume the defensive stand position when threatened. At this point, the kits may accompany their mother outside the den, becoming independent after 2½ months. Denning and sheltering behaviors The striped skunk may dig its own dens, though it will appropriate those abandoned by other animals should the opportunity present itself. These dens are normally used only in late fall, winter, and early spring, while females with unweaned kits make use of them in late spring and summer. In cultivated areas, striped skunks will dig their dens in fencerows, likely because they are less likely to be disturbed by machinery or livestock. In winter it is common for a single den to be occupied by multiple females and a single male. During this period, the striped skunk saves its energy by lowering its body temperature from 38 °C to 32 °C. Although it will forage for short periods in winter, it primarily depends on its fat reserves in cold weather, and can lose as much as 50% of its body weight. Ecology Habitat The striped skunk inhabits a wide variety of habitats, particularly mixed woodlands, brushy corners and open fields interspersed with wooded ravines and rocky outcrops. Some populations, particularly in northwestern Illinois, prefer cultivated areas