In the early 1800s, passenger pigeons were the most abundant bird species in North America, possibly the most abundant bird in the entire world. Flocks numbering in the billions would darken the skies for hours, even days, as they passed overhead. The sound of their wings was described as deafening thunder. Branches broke under their weight when they roosted. A single flock could be a mile wide and 300 miles long. Naturalist John James Audubon watched one migration for three days straight and estimated over one billion birds. Then we killed them all.

By 1900, wild passenger pigeons had completely vanished. On September 1, 1914, the last living passenger pigeon, a female named Martha, died alone in her cage at the Cincinnati Zoo. She was 29 years old. In just 50 years, humans had driven the most numerous bird on Earth from billions to zero through relentless commercial hunting, habitat destruction, and industrial-scale slaughter. Hunters would kill thousands in a single day. Entire trainloads of dead pigeons were shipped to city markets. We thought the supply was endless. We were catastrophically wrong.

Join us as we explore the fastest extinction of a species in recorded history, the massive flocks that awed early Americans, the brutal hunting industry that destroyed them, and Martha's lonely final years as the last of her kind. Scientists are now attempting to bring passenger pigeons back through de-extinction. But can we?

Keywords: passenger pigeon extinction, Martha last passenger pigeon, extinct birds, American extinction, de-extinction, passenger pigeon flocks, extinct species, wildlife extinction, Cincinnati Zoo, John James Audubon, commercial hunting, extinct animals, passenger pigeon history, species extinction, bring back extinct animals, environmental history