Thanks, Dave. A mosaic is a real possibility. I did think of
mosaicism, but in typical mosaics the male and female cells are mixed up
and scattered all over the body (as the name implies), not segregated in
head vs. body, like this duck. I should have looked it up before I
posted, though, because in chimeras, a form of mosaic, the mix of male
and female is patchier, and might explain the pattern of this duck.
Gynandromorphy is another possibility, but this usually shows
bilaterally, with the left and right sides of the body being different
sexes. Hermaphrodism properly refers only to a mix sex organs, so I was
wrong to suggest that term.

http://en.wikipedia.org/wiki/Chimera_%28genetics%29

http://en.wikipedia.org/wiki/Gynandromorph

Rachel Lawson
Seattle
RachelWL at msn.com


-----Original Message-----
From: tweeters-bounces at mailman2.u.washington.edu
[mailto:tweeters-bounces at mailman2.u.washington.edu] On Behalf Of dave
templeton
Sent: Saturday, January 01, 2011 6:21 AM
To: Tweeters
Subject: [Tweeters] re: Odd male-female plumage combination in
Green-wingedTeal, Poulsbo


might be a mosaic bird. see, e.g.,

http://en.wikipedia.org/wiki/Mosaic_%28genetics%29

http://miami.ebayclassifieds.com/birds/homestead/ultra-rare-mosaic-conur
e-babies-and-cinnamon-greencheeks/?ad=7834751

http://pics.hoobly.com/full/RDPJ983466JO.jpg


regards,


t

--
dave templeton
fall city, wa

crazydave65atgmaildaughtcom

"Don't worry about the world coming to an end today; it's already
tomorrow in Australia." Charles Schultz