Extinct bird species: Passenger Pigeon. The Passenger Pigeon was a very social bird that lived in large flocks. By the early 20th century, the passenger pigeon died out completely due to hunting and destruction of natural forest habitat
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.