The Mexican gray squirrel lives among forest trees and is notable for its reddish-brown belly and flanks. Its coat varies across its range.
Its back has a salt-and-pepper pattern that may be darkened by melanism, while the belly and flanks range from white to deep chestnut. The reddish marking can extend onto the shoulder, with its prominence varying by region.
It is active by day and uses both trees and the forest floor in its native Mexican and Guatemalan range. It eats fruits and seeds, with foods varying by place and season.
An extinction-risk assessment has not been added yet.