The term 'Extinct Flightless Bird' refers to two birds that are now extinct, the MOA and the DODO. The MOA was a large, flightless bird native to New Zealand that became extinct in the late 15th century due to hunting by humans. The DODO was a large, flightless bird native to the island of Mauritius in the Indian Ocean that became extinct in the 17th century due to hunting by humans and predation by introduced species. Both birds were unable to fly due to their large size and lack of wings.