The nail-tail wallabies (genus Onychogalea) are three species of macropod found in Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. They are distinguished by a horny spur at the end of their tail, and are now generally very rare. Only one species (the Northern Nail-tail Wallaby) has survived European settlement unscathed: the Crescent Nail-tail is extinct, and the Bridled Nail-tail is seriously endangered. Nail-tail wallabies are smaller than many other wallabies.

Species

There are three species:

• Bridled Nail-tail Wallaby
  Bridled Nail-tail Wallaby
  Bridled Nail-tail Wallaby refers to Onychogalea fraenata, an endangered species of marsupial. It is a small wallaby found in three isolated areas in Queensland, Australia, and whose population is declining...
  
  , Onychogalea fraenata
• † Crescent Nail-tail Wallaby
  Crescent Nail-tail Wallaby
  The Crescent Nail-tail Wallaby was a nail-tail wallaby that lived in the woodlands and scrubs of the west and centre of Australia. It had silky fur and, like other nail-tail wallabies, had a horny spur at the tip of its tail. It was the size of a hare and was the smallest nail-tail wallaby at...
  
  , Onychogalea lunata
• Northern Nail-tail Wallaby
  Northern Nail-tail Wallaby
  The Northern Nail-tail Wallaby , also known as the Sandy Nail-tail Wallaby, is a species of macropod found in Queensland, Western Australia and Northern Territory. Unlike the Bridled Nail-tail Wallaby , the Northern Nail-tail Wallaby is not a threatened species. The only other member of the genus,...
  
  , Onychogalea unguifera