How did it happen? How did humans, in about 30 years, entirely kill off a bird species that once numbered in the millions, if not billions? In A Feathered River Across the Sky: The Passenger Pigeon's Flight to Extinction, researcher Joel Greenberg covers the incredibly fast decline and disappearance of this iconic bird. One of the best-known examples of the end of a species, Greenberg delves deep into the various theories and causes of its extinction.
The mass slaughter of these birds in the years 1850-1880 has been well-documented, and Greenberg describes in great detail the methods (nets, guns, traps, etc.) that were used to capture or kill them. Due to the pigeons’ tendency to flock in the thousands or more, they made for easy targets no matter what method used. While the pigeons were initially found in large numbers from the Eastern seaboard west to the Rockies, their last huge flocks were found mostly in the area of the Great Lakes. Greenberg posits that the pigeons could live only as members of these large flocks; without the protection and community that this provided the birds, they were unable to survive.
After the decades of the late 1800s, only a few were found here and there over their once large range. Finally, in 1914, the last of the Passenger Pigeons, Martha, died at the Cincinnati Zoo. Greenberg’s book is an elegy marking the centennial of her death and that of her entire species. The national conservation movement, spearheaded by Teddy Roosevelt, John Muir and others, came too late to save the Passenger Pigeon, but changed the mentality of the limits of human encroachment on nature. Though even with the scholarship and understanding that Greenberg and others have provided, we are left asking ourselves: how did it happen?