Brownish gray above; grayish below. Scaly tail slightly less than half the total length, darker above then below. Small eyes. Prominent ears. L 12 3/8-18 1/8"; T 4 3/4-8 1/2"; HF 1 1/8-1 3/4"; E 5/8-1"; Wt 6 7/8-17oz.

Black Rat has proportionally longer tail (more than half its total length). Woodrats have white underparts.

Breeds year-round; like other rodents, sometimes mates within hours of giving birth; gestation 21-26 days; female may bear up to 12 litters per year of 2-22 young (usually about 5 litters of 7-11 young). Young born hairless and blind; open eyes at 2 weeks; are weaned at 3-4 weeks.

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Habitat