Over the 19th century, the species crashed from being one of the most abundant birds in the world, 3-5 billion at peak, to extinction.
Ectopistes migratorius was formerly distributed across North America. The last wild bird was shot in 1900, and surveys in 1910-1911 failed to record any. The last captive bird died in 1914 in the Cincinnati Zoo.
It was a nomadic species, breeding and foraging in vast flocks millions of birds strong. With top speeds of 62mph.