Molerats

Molerats are the only eusocial vertebrates known to man.

This means that these mammals live in colonies similar to those of ants and termites, with a single fertile queen giving birth to nonreproductive workers and soldiers.

Molerats are also famous for their incredibly powerful jaws, the muscles of which constitute 25% of their body mass.

Baby molerats are raised on a diet of their older sibling's fecal pellets, emitting a special cry when hungry to summon a worker.