 The DNA obtained from the Oxford specimen is degraded, and no usable DNA has been extracted from subfossil remains, so the age of the groups divergence from other pigeons still needs to be independently verified.The dodo lost the ability to fly owing to the lack of mammalian predators on Mauritius.Another large, flightless pigeon, the Viti Levu giant pigeon ("Natunaornis gigoura"), was described in 2001 from subfossil material from Fiji.