Werewolves

At the end of Breaking Dawn, a distinction is made in the Twilight universe between "true werewolves" who transform according to the lunar cycle, and the giant Quileute tribal wolves who can phase at will and retain their mental faculties while transformed. Instead, the latter are referred to as shape-shifting humans who assume wolf form. As long as they regularly phase into wolves, they never age. They heal quickly, have enhanced physical speed and strength, and can communicate telepathically with one other while in their wolf forms.