Icymi-- Different species, and different phenology, but related to similar genetic regime...
-- Marty Wolf
NW CO Spgs
-----Original Message-----
From: Eric DeFonso <bay.wren@gmail.com>
To: cobirds@googlegroups.com
Sent: Sun, Dec 6, 2020 9:12 am
Subject: Re: [cobirds] Re: Odd duck at Fort Collins City Park (Sheldon Lake) - Larimer on 5Dec2020
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From: Eric DeFonso <bay.wren@gmail.com>
To: cobirds@googlegroups.com
Sent: Sun, Dec 6, 2020 9:12 am
Subject: Re: [cobirds] Re: Odd duck at Fort Collins City Park (Sheldon Lake) - Larimer on 5Dec2020
The following link goes to an article on the BBC page from a few years ago, titled, "How Does a Duck Change Its Sex?" It does a nice job explaining in layperson terms of genetics and life history what the phenomenon even is, and although it's mostly about the article writer's particular Mandarin Duck, it applies to most if not all ducks.
A very pertinent and recommended read:
Eric
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Eric DeFonso
near Lyons, Boulder County, CO
near Lyons, Boulder County, CO
On Sun, Dec 6, 2020 at 7:42 AM Kathy and Jeff Dunning <mihmdunning@gmail.com> wrote:
I agree with Sebastian.I had a very similar creature a couple of summers ago in the mountains and sent the photos to Steve Mlodinow. He responded that it was likely an "intersex duck". This occurs when a female gets old, starts running low on hormones and starts looking like a basic plumaged (ie: breeding plumage) male.Pretty cool.Good birding,
Kathy Mihm DunningDenver
--On Sun, Dec 6, 2020 at 6:21 AM Sebastian Patti <sebastianpatti@hotmail.com> wrote:--Age may play a role in that as well . . . possibly a VERY old female.
Unit 3088Los Angeles, CA 90017
CELL: 773/304-7488
From: cobirds@googlegroups.com <cobirds@googlegroups.com> on behalf of DAVID A LEATHERMAN <daleatherman@msn.com>
Sent: Saturday, December 5, 2020 11:21 PM
To: Colorado Birds <cobirds@googlegroups.com>
Subject: [cobirds] Odd duck at Fort Collins City Park (Sheldon Lake) - Larimer on 5Dec2020Today at Sheldon Lake in Fort Collins City Park I was scanning thru the 150 or so Mallards and saw one with a head that was green throughout the top half and tan throughout the bottom half. It had a maroon chest, yellow and black beak and body like a female Mallard. In perusing the Sibley Field Guide he actually shows a very similar bird and says it is a known rare occurrence of a female that has certain male field marks (namely, the top of the head coloration and the chest). I have seen individuals that apparently are hybrids between Mallard and Black or Mallard and Mexican, that show odd green color configurations on the head, but never one with this head pattern and assortment of other gender characteristics. Just thought I'd share.
Dave LeathermanFort Collins--
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