 Other highly endangered species include Sumatran dhole, Sumatran elephants, Sunda clouded leopard, Malayan tapir, and Malayan sun bear.In 2008, the International Union for Conservation of Nature added a second species of muntjak deer to the Sumatran list of fauna with the rediscovery of the Sumatran muntjac, a deer not recorded since the late 1920s and now concluded as a new species and not subspecies.The park also protects more than 370 bird species, including the Sumatran ground-cuckoo rediscovered in the park in 2002.