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Description"The tawny-bellied cotton rat is the largest of the Sigmodon species, and dominates other cotton rats where more than one species occurs. Its back fur has a speckled, ""salt and pepper"" look, and its underparts are buff-colored, giving it two common names: tawny-bellied and yellow-bellied. The tail is dark and has just enough hair to hide the scales. Like other cotton rats, and voles, the tawny-bellied cotton rat constructs grass-lined paths. Litters of 4 or 6 young are born in nests built from woven grasses. They leave the nest to run around when they are about a week old, and are sexually mature and ready to breed when they are about six weeks old."
Mammal Species of the World
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