Fossorial

A fossorial (from Latin fossor, "digger") animal is one that is adapted to digging and life underground such as the badger, the naked mole-rat, or the mole salamanders.

Most bees and many wasps are called "fossorial Hymenoptera", and a great many rodents are considered fossorial although the physical adaptations to living underground are minimal. Nevertheless, mostly from 2000 on, for rodents the term fossorial has been used for species that live in burrows during a considerable part of the day but are surface-dwelling during other parts of the day, while for species that live all their life underground (or at least almost all the time) the term subterranean has been applied.