Gilbert's Potoroo
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This marsupial was first discovered in 1840 by John Gilbert, but by 1870 people believed it to be extinct. Gilbert's Potoroo was eventually rediscovered in 1994 on the south coast of Western Australia. Image: John Gould [Public domain], via Wikimedia Commons.
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A number of animals that have been considered extinct have reappeared in the records, including birds, reptiles, fish and mammals. A study conducted by the University of Queensland in 2010 found that of 187 mammals listed as extinct, 67 had been rediscovered.
