CC: NYSbirds-L@cornell.edu
From: birderla...@verizon.net
Subject: Re: [nysbirds-l] gyrfalcon age info
Date: Thu, 28 Feb 2013 11:19:14 -0500
To: leorm...@gmail.com
Anybody see the gyr today? Might make a run out there. Thx!Larry
Sent from my iPhone.
On Feb 27, 2013, at 5:05 PM, Luke Ormand <leorm...@gmail.com> wrote:
The following is from Jerry Liguori (author of several books on raptors) which
he made to me after seeing Doug Gochfelds photos:
"It is an adult. It has molted once, you can see some retained juv upperwing
coverts. So, it is in its first year of adulthood. This plumage is identical to
older adults in all regards except fleshy part coloration, which varies in the
rate it changes from bluish to yellow between sexes (males a bit quicker -- in
Prairie Falcon too, of which I show a spring in-hand juv male in HFEA [hawks
from every angle]), and between the larger falcons. The legs, cere, and orbital
ring are a typical color for this age. Of the falcons, it takes Gyr the longest
for the fleshy parts to change color, and it is the feet that change
quicker....but this also varies."
Jerry Liguori
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www.birdsoflongisland.blogspot.com
www.wildlongisland.blogspot.com
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