Bailey's pocket mouse (Chaetodipus baileyi) is a species of rodent of the subfamily Perognathinae, family Heteromyidae.

Bailey's pocket mouse is the only known animal to be able to digest the wax found inside the jojoba nut and is the only rodent from the Sonoran Desert that is able to eat the seeds, because they are poisonous to most other mammals.

[4] In the 1970s, researchers removed kangaroo rats from an ecosystem in the Chihuahuan Desert, and for many years, no other small rodents moved in to fill the niche they left.

In 1995, twenty years after the experimental removal, Bailey's pocket mouse moved into the area and filled the gap, almost completely replacing the missing kangaroo rats.

[6] Bailey's pocket mouse varies in abundance between about two and eighty animals per hectare, depending on the amount of rainfall and hence on its food supply.