Olneya tesota is an indicator species of the Sonoran Desert region.[2] The Sonoran Desert has one other species with the identical north-south, and east-west range. The seasonally migrating lesser long-nosed bat follows the bloom season of various species from south to north and extends into the same regions of the Sonoran Desert as Olneya. The bat ranges from southern Baja California del Sur and north into the southwestern United States.[3]