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.
Passenger Pigeon - The species went from being one of the most abundant birds in the world during the 19th century to extinction early in the 20th century. The world's last Passenger Pigeon, died on September 1, 1914.