Illustration of juvenile (left), male (center), and female (right), Passenger Pigeons. (AAP042CA). I scanned it from the following publication--now in the public domain: Birds of New York (New York State Museum. Memoir 12), Albany: University of the State of New York. Date of publication : 1910-1914 Illustration by Louis Agassiz Fuertes (1874-1927) Information also at Wikimedia Commons
. This image is in the public domain, but Flickr does not have a setting for that license--so I have given it the least restrictive Creative Commons License.