The term 'Bygone Bird' refers to three extinct species of birds: the MOA, DODO, and Passenger Pigeon. The MOA was a large flightless bird native to New Zealand that went extinct in the 15th century. The DODO was a flightless bird native to the island of Mauritius that went extinct in the 17th century. The Passenger Pigeon was a migratory bird native to North America that went extinct in the early 20th century. All three species were driven to extinction due to human activity.