Notiosorex

• Cockrum's Gray Shrew Notiosorex cockrumi

  Cockrum's Gray Shrew is a small shrew, about 78–86 mm in total length. It ranges from southern Arizona to central Sonora, where described localities include riparian woodland and mesquite grassland.

• Crawford's Gray Shrew Notiosorex crawfordi

  This small shrew occurs in the southwestern and south-central United States and central Mexico. It has been recorded in dry habitats.

• Villa's Gray Shrew Notiosorex villai

  Villa's Gray Shrew is a small shrew recorded only in mountain valleys of Tamaulipas, northeastern Mexico. Its coat changes with the season, and vegetation differs among known sites.