Species MammalsArizona Cotton Rat

Arizona Cotton Rat

Sigmodon arizonae

UncommonMammal
Illustration of Arizona Cotton Rat (Sigmodon arizonae)

The Arizona Cotton Rat is a medium-sized rodent of desert grasslands and marsh edges in Arizona and New Mexico, closely related to the more widespread hispid cotton rat. It thrives along desert stream corridors with dense grass cover and is an important prey species for a variety of raptors including ferruginous hawks and owls. Its populations track available grass cover, increasing rapidly in wet years.

Habitat
Desert grasslands, marsh edges, and streamside vegetation
Diet
Grasses, sedges, and green plant material
How common
Uncommon

Best time to see a Arizona Cotton Rat

The best time to see a Arizona Cotton Rat is April–July, when about 63% of U.S. sightings happen, based on 382 research-grade iNaturalist observations.

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