The Mexican cottontail (Sylvilagus cunicularius) is a species of cottontail rabbit in the family Leporidae. It is endemic to Mexico where its natural habitats are temperate forests, subtropical or tropical dry forests and pastureland. The Mexican cottontail is one of the largest members of its genus at 1,800 to 2,300 grams (63 to 81 oz), and is the largest Mexican rabbit. It has coarse reddish-brown or greyish-brown fur and white underparts. In maturity, the pelage becomes a paler, yellowish-gray color. External body measurements include a body length of 485–515 mm (19.1–20.3 in), a tail length of 54–68 mm (2.1–2.7 in), hind foot length of 108–111 mm (4.3–4.4 in), and an ear length of 60–63 mm (2.4–2.5 in). Populations from the Sierra Madre de Oaxaca tend to be slightly larger than those in other parts of the range.