Hi Bill,
Thanks for ending the link! I don't think that the white markings on the crow
is a result of common leucism, where some feathers (or all of one pigment) are
randomly white. The pattern on both wings seem to be about the same. I think
that it might be a generic variance. Sibley doesn't show leucistic birds in
his field guide, but does show the crows with white wing patches as a variation.
Iâve seen a few birds that were completely missing dark pigment, but were not
albinos. Here are links to a couple of my photos:
Carolina Chickadee:
http://www.faintich.net/Wildlife/NAmerica/Chickadees/Carolina_Chickadee_FA019317.jpg
Northern Cardinal:
http://www.faintich.net/Wildlife/NAmerica/Cardinals/Leucistic_Cardinal_FA174903.jpg
Cheers,
Marshall
______________________________________
Marshall Faintich
Crozet, VA
<mailto:marshall@xxxxxxxxxxxx> marshall@xxxxxxxxxxxx
<http://www.faintich.net/> www.faintich.net
In real life, the shortest distance between two points is never a straight
line, so you might as well enjoy the journey !!
___________________________________________________________________________________________________
From: William Hohenstein [mailto:wghohenstein@xxxxxxxxx] ;
Sent: Sunday, June 14, 2020 10:20 PM
To: FAtwood@xxxxxxxxxxxxx
Cc: Marshall Faintich; va-bird
Subject: Re: [va-bird] Re: Rare Crow variety
Marshall/Fred,
Thanks for posting.
In January 2019, I ran into a crow that was almost completely white except for
markings on the face - it was in a cemetery in Northampton County.
I was able to catch a short video of it:
https://www.flickr.com/photos/73831614@N00/46734644732/in/album-72157704390396241/
Bill
Sent from my iPhone
On Jun 14, 2020, at 4:38 PM, Fred Atwood <FAtwood@xxxxxxxxxxxxx> wrote:
Following up on Marshall's white wing-patch crows, which I also have seen
here in Oakton a few times, I came across these interesting articles that
you might find useful.
https://www.birds.cornell.edu/crows/whitecrows.htm
https://corvidresearch.blog/tag/leucistic-crow/
Could be a low protein diet, or genetics, or other factors.
I would guess that protein in the diet might be particularly important as
growing nestlings form and pigment all their feathers simultaneously.
Thanks, Marshall
All the best
Fred Atwood
On Sun, Jun 14, 2020 at 1:17 PM Marshall Faintich <marshall@xxxxxxxxxxxx>
wrote:
27 avian species including American Crow with white wing patches; Crozet,
VA; 6/14/2020. Report and photos:
<http://www.faintich.net/Blog2020/2020_06_14.htm>
http://www.faintich.net/Blog2020/2020_06_14.htm
______________________________________
Marshall Faintich
Crozet, VA
marshall@xxxxxxxxxxxx
www.faintich.net <http://www.faintich.net/>
In real life, the shortest distance between two points is never a straight
line, so you might as well enjoy the journey !!
____________________________________________________________________________
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