Cobirders: I put a few of my own distant and not sharp photos into a
Picasa web album showing this week's Boulder County hybrid duck. I also
point out a few field marks supporting why one parent is a Green-winged
Teal and the other parent seems to be an American Wigeon,
Here is an abbreviated link to the Picasa web album:
http://bit.ly/gH7xb2
My first blowup image is a distant shot but I have superimposed some
identification text to point out the teal characteristics:
1. Blue AND black bill = combined bill color patterns of Green-winged
Teal and Am Wigeon,
2. Bold green blaze through head - undiluted shared characteristics
of Green-winged Teal and Am. WIgeon (but, shaped like a G-w teal)
3. The pinkish not white vertical stripe (male G-w teal) and diluted
head color is a dilution of teal characteristics by Am. wigeon genes.
4. no white upper wing patch of a wigeon. Not sure why such a bold
wigeon characteristic is lost in a hybrid, but flight views show
it is not present,.
There is a comment area below each picasa photo. Feel free to offer
comments.
--
Bruce Webb
Granite Bay, CA
'Have scope - Will travel'
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