Eastern Quoll
This rather elusive marsupial, which was believed to have become extinct from mainland Australian over 50 years ago, was recently rediscovered in New South Wales, according to The Sydney Morning Herald. They are widespread in Tasmania, but were eradicated from larger Australia by the introduction of red foxes, and the last confirmed mainland spotting of the animal happened around Sydney in 1963. However in 2016, someone had discovered one in 1989 and had it stuffed, giving hope that they weren’t completely eliminated from the mainland.
Jerdon’s Tree Frog
Jerdon’s tree frog was last seen in the wild way back in 1870 and has long believed to be extinct. Coincidentally, it actually resurfaced in India following a “three-year search that began in 2007” by a team led by biologist Sathyabhama Das Biju. Experts are under the assumption that it went unseen for so long due to “the regions where it lives now are poorly surveyed by biologists.”