Related Articles
Audubon Magazine: Project Passenger Pigeon
http://www.audubonmagazine.org/articles/birds/project-passenger-pigeon
The Guardian: 2014: the year of the passenger pigeon
http://www.theguardian.com/science/animal-magic/2014/jan/13/2014-martha-passenger-pigeon
New York Times: The Mammoth Cometh
http://www.nytimes.com/2014/03/02/magazine/the-mammoth-cometh.html
Audubon Magazine: A Comeback for the Passenger Pigeon?
http://www.audubonmagazine.org/articles/birds/comeback-passenger-pigeon
Audubon Magazine: Why the Passenger Pigeon Went Extinct
http://www.audubonmagazine.org/articles/birds/why-passenger-pigeon-went-extinct
