The bridled nail-tail wallaby (Onychogalea fraenata), also known as the bridled nail-tailed wallaby, bridled nailtail wallaby, bridled wallaby, merrin, and flashjack, is an endangered species of macropod. It is a small wallaby found in three isolated areas in Queensland, Australia, and whose population is declining. The total population of the species is currently estimated to be less than 1,100 mature individuals in the wild.