As more and more "historical" checklists are added to the platform, birds we've lost now mingle with those still hanging on.

Researchers have rediscovered a rare fish species presumed to be extinct after it was not seen for more than eight decades. The last sighting of the Chel snakehead, or Channa amphibeus ...

A new review has documented the remarkable journey of Australia's most critically endangered marsupial, the Gilbert's potoroo, from its rediscovery to ongoing recovery efforts.