Girl with Passenger Pigeon. The extinction of the Passenger Pigeon had two major causes: commercial exploitation of pigeon meat on a massive scale and loss of habitat. Another significant reason for its extinction was deforestation.
“Martha,” a passenger pigeon named after George Washington’s wife, was the last of her kind. Immediately following her death in 1914 at the Cincinnati Zoological Gardens, she was packed in an enormous 300-pound block of ice and shipped to the Smithsonian.