SLIMBIRD Gerard
Fri, 18 Dec 2009 08:24:45 -0800
A related discussion which I¹m sure many on the list might be interested in learning more about in general is flight call variation of adult verses juvenile birds. Any known examples of North American species that give distinctive age related flight calls either diurnal or nocturnal? Sincerely, Gerard Phillips Ontario, Canada On 12/17/09 10:48 AM, "Andrew Farnsworth" <andrew.farnswo...@gmail.com> wrote: > variation may exist among calls given in migration, non-breeding, and > post-breeding seasons, and on and on -- NFC-L List Info: http://www.NortheastBirding.com/NFC_WELCOME http://www.NortheastBirding.com/NFC_RULES Archives: 1) http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html 2) http://birdingonthe.net/mailinglists/NFCL.html 3) http://www.surfbirds.com/birdingmail/Group/NFC-L Please submit your observations to eBird: http://ebird.org/content/ebird/ --