Native to northern Mexico and the southwestern United States, the desert tortoise (Gopherus agassizii) once roamed all over the vast Mojave and Sonoran ... "They are a keystone species, meaning ...

or Gopherus agassizii — are officially a different species from tortoises in Arizona and Mexico, previously called "the Sonoran population of desert tortoises" and newly dubbed Morafka's desert ...

A key point of the event is to invite viewers to consider how drastically the Sonoran Desert has changed over ... Some of the exact species on display were probably here, and if not, then their ...