100 years since the death of the last passenger pigeon

http://news.nationalgeographic.com/news … s-species/

A hundred years ago on Monday, a once-mighty species became extinct. At the Cincinnati Zoo, a passenger pigeon named Martha died at the age of 29.

People coming to the zoo to see the last passenger pigeon were disappointed by the bird, which barely budged off its perch. As Joel Greenberg writes in his recent book A Feathered River Across the Sky, some threw sand into its cage to try to force it to walk around. But on that first day of September a century ago, Martha no longer had to put up with such humiliations.

It was a quiet end to a noisy species. As recently as the mid-1800s, deafening flocks of billions of passenger pigeons swarmed across the eastern half of the United States. But they proved no match for humans, whose rapidly advancing technology drove the birds to extinction in a matter of decades.