[1] The Mexican fox squirrel has a grizzled brown back with a yellow to rufous underside, and a charcoal tail frosted with white.

[8] The Mexican fox squirrel forages extensively on the ground and in the forest canopy for tree seeds, flowers, and fungi.

Acorns and walnuts are also eaten when available, along with a variety of other tree seeds, hypogeous and occasionally epigeous fungi, and insects.

[9] Mexican fox squirrels occasionally cache large seeds by scatter-hoarding them in leaf litter and topsoil.

[11] Mexican fox squirrels typically produce a single small litter of 1 or 2 young in late spring or summer.