The Mexican Fox Squirrel – Sciurus nayaritensis is found in the Chiricahua Mountains in southeastern Arizona, USA and in the Sierra Madre Range in Central Mexico. The species is split into three subspecies:
- S. n. nayaritensis – Nayarit fox squirrel
- S. n. apache – Apache fox squirrel
- S. n. chiricahuae – Chiricahua fox squirrel
