Over on the ID Frontiers mailing list (BIRDWG01) , there is a very interesting thread on a current article in the Auk on introgression in bird species and its role in promoting genetic variability and speciation in birds. Of particular interest to this list is the fact that the putative Ross's Goose in Ashtabula is cited prominently as a case in point. Many readers of this list will find this discussion illuminating. Cheers, Bob -- Robert D Powell Congress Farm Research Institute Wilmington, OH, USA [log in to unmask] http://rdp1710.wordpress.com Nulla dies sine aves ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Our thanks to Miami University for hosting this mailing list. Additional discussions can be found in our forums, at www.ohiobirds.org/forum/. You can join or leave the list, or change your options, at: http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]