I believe that the extinction of the Passenger Pigeon is one of the most terrible examples of mass slaughter by men. The Passenger Pigeon was a very beautiful bird with a slender body, long pointed tail, brown back and pink breast. The male passenger pigeon bill is straight, of ordinary length, rather slender, broader than deep at the hase, with a tumid fleshy covering above, compressed towards the end, rather obtuse; upper mandible slightly declinate at the tip; edges inflected. Wings long, the second quill longest. The female bird could only lay one egg a year.
Their roosting sites were correspondingly enormous- some