Date: 12/29/20 11:32 am
From: Scott <pygmyowl...>
Subject: Re: [cobirds] Why Female Red-winged Blackbirds only?
My guess is that the birds your seeing are young males. Many males,
especially juveniles have a rusty edge to their feathers that will wear
off my spring. This may make them appear like females.

 From what I have been seeing near Fort Collins and Loveland, all the
Red-wings that I am seeing are males.

Scott Rashid

Estes Park

On 12/29/2020 11:11 AM, W. Robert Shade III wrote:
> I have as many as 50 or more Red-winged Blackbirds swarming my feeders
> every morning. Why are they all females? Males do not look like
> females in winter do they? This means they must spend the winter in
> different places. If so, what is the rationale for that? I cannot
> think of any other species that segregates by gender in winter.
>
> Bob Shade
> Green Mountain
> Lakewood
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