South American rats and mice Sigmodontinae

Class Mammalia Order Rodentia Suborder Sciurognathi Family Muridae Subfamily Sigmodontinae

Thumbnail description

Small- to medium-sized mice and rats; in general brownish or blackish upper pelage and grayish or whitish underparts; tail usually thinly haired; molars with two rows of cusps

Size

Head and body length: 2.4-11.4 in (61-290 mm); tail length 1-6.3 in (30-160 mm); weight: 0.4-18 oz (12-510 g).

Number of genera, species

71 genera; 373 species

Habitat

All habitats (e.g., dry deserts, wet tropical forests, wetlands, savannas, steppes, temperate woodlands, high altitude grasslands, salt flats, scrublands) found in their distribution range up to 17,000 ft (5,200 m) above sea level

Conservation status

Extinct: 6 species; Critically Endangered: 8 species; Endangered: 24 species; Vulnerable: 23 species; Lower Risk/Near Threatened: 36 species; Data Deficient: 3 species

Distribution

Endemic to the New World; living forms range from Tierra del Fuego, the southernmost part of South America, up to southern United States; also distributed on some islands adjacent to the continent as well as in the oceanic Galápagos archipelago

Distribution

Endemic to the New World; living forms range from Tierra del Fuego, the southernmost part of South America, up to southern United States; also distributed on some islands adjacent to the continent as well as in the oceanic Galápagos archipelago

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