I've been looking at some photos I took recently of Crossbills and noticed that on one bird the upper mandible crosses over the right side of the lower mandible and on another bird it crosses on the left. Does anybody out there know if there is a preference either way, or is it a 50% proposition?
Greg Prelich New Rochelle -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME http://www.NortheastBirding.com/NYSbirdsRULES http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/[email protected]/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birdingonthe.net/mailinglists/NYSB.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --
