Date: 11/21/20 3:14 pm From: Joe Morlan <jmorlan...> Subject: Re: [pen-bird] Glaucous Gull San Gregorio etc.
Do Tricolored Blackbirds also segregate into single sex flocks or is it just Red-wings that do that?
On Thu, 19 Nov 2020 10:04:17 -0800, "Alvaro Jaramillo" <chucao...> wrote:
> I also have a Northwestern Red-winged Blackbird (subspecies caurinus) at the feeders in the backyard. These females are more streaked than our residents, and have much stronger rusty edging on the upperparts. Often they are in all female flocks around here, and only in winter. The males are not as common on the coast as the females, but they are frequent in the Central Valley in winter. Again, they segregate in winter into single sex flocks. -- Joseph Morlan, Pacifica, CA