In light of the recent incursion of Snowy Owls I thought the following selection of papers would be of interest. They attempt to questions about the aging and sexing of Snowy Owls.
The first paper on the list also discusses local movements of these birds on Long Island and New York City, etc. during previous incursions.
http://www.nybirds.org/KBsearch/y1966v16n2/ y1966v16n2p73-77cohen.pdf#search=%22banding%20snowy%20owls%22
http://www.birds.cornell.edu/crows/snowy.htmhttp://www.dvoc.org/OrnithStudy/Presentations/Presentations2012/Snowy% 20Owl%20plumages.pdf
http://www.irbc.ie/notes/snowy/snowy.php Peter Post New York City pwp...@nyc.rr.com -- 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/nysbirds-l@cornell.edu/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/ --