The pigeon was known as Martha, and the species was the Passenger Pigeon. Amongst all extinctions, this example remains unusual in two respects: the precision with which the timing is known and the overwhelming abundance of the species just a few decades earlier – for, just a few decades before Martha died, the Passenger Pigeon was the commonest bird on Earth.| Mark Avery
How did billions of passenger pigeons disappear so suddenly? A deep dive into one of history’s greatest extinction mysteries.| Project Upland