September 1st is the 100th anniversary of the day that the final passenger pigeon, a female name Martha, died in the Cincinatti Zoo. What makes the extinction of this species is that just a hundred years earlier the population size of passenger pigeons was in the billions!!
This recent article from the New York Times disucsses this specie's extinction.
http://www.nytimes.com/2014/08/31/opinion/sunday/saving-our-birds.html?utm_source=Cornell+Lab+eNews&utm_campaign=a2816d4773-eNews_Flash_Times_OpEd_Article_31August_2014&utm_medium=email&utm_term=0_47588b5758-a2816d4773-277675305&_r=1
