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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