Originally posted by normhead K-3 - DA*200 ƒ2.8 with HD DA 1.4 TC and F1.7 AF adapter Stacked
400 ISO, ƒ8, AV mode.
I wondered if they were male and female, but can't find that anyone has much to say on the topic. Except
Cornell says they have great colour variation, and Wiki says there are subspecies but doesn't provide identifying photos.
Is there a Dark Eyed Junco expert in the house?
You cross-posted this to another thread. I didn't realize that a parallel discussion was going on in this thread.
The brownish ones are immature birds, i.e., those who have already undergone the Post-Juvenal moult at the end of summer and are therefore no longer juveniles, but have not moulted into First Alternate plumage and therefore not adults yet. I think they moult into First Alternate plumage around this time of year into breeding plumage but I don't have Rising's and Beadle's identification guide to North American sparrows or Pyle et al.'s identification guide to North American passerines here in the office to confirm that. I can't remember if this species has delayed plumage maturation, i.e., don't moult into Definitive Alternate plumage until their second spring.
A Guide to the Identification and Natural History of the Sparrows of the United States and Canada (Poyser Natural History), 1996, by James D. Rising (Author), David Beadle (Illustrator), Academic Press.
Identification Guide to North American Passerines: A Compendium of Information on Identifying, Aging, and Sexing Passerines in the Hand,1987, by Peter Pyle (Author), Steve Howell (Author), et al., Slate Creek Press.
Edit: I looked it up. Dark-eyed Junco has a partial Pre-Alternate moult in February to April, and attains its Definitive Alternate (adult breeding) plumage after its first winter. So, last year's fledglings get their adult breeding plumage right after their first winter.
---------- Post added 25th Apr 2016 at 16:59 ----------
Originally posted by csa These appear to be the "slate-colored" variation. They range from gray to gray-brown, with little contrast with the "hood" on the head.
One of the main varieties I have is the "Oregon".
This photo is the pink-sided race (
Junco hyemalis mearnsi), not Oregon (
Junco hyemalis thurberi), which is substantially darker.