Brainard,
Thanks for that precise precis!
Brief but lucid.
Sunil
On Saturday, June 6, 2020, 09:50:13 AM EDT, <brainard@xxxxxxxxxxxxxx>
wrote:
<!--#yiv6425469503 DIV {margin:0px;}-->See Steve's question below ...
Bird plumage terminology is confusing ... there are sort of two systems, one
that uses calendar years and another that uses the actual age of the birds.
So these young male orioles were hatched last year (2019). Because they are now
alive in their second *calendar* year, banding jargon would call this a SY male
or "second-year" male because the banders' system uses the calendar. (FWIW ...
I've never liked this one!)
Sibley is using a more traditional system of terminology that reflects how old
the bird is. As a full grown bird, it is actually in its "first summer" because
during summer 2019 it was in juvenile plumage. This past winter, it acquired
that black throat and some bits and pieces of the rufous color of the adult
male. If you look at Sibley's "fine print" (the months in parentheses) he shows
that these "first-summer" males look like this from late winter of their first
year of age into the late summer (in this case a male hatched during summer
2019 molts into this plumage about February 2020 and retains it through August
2020).
A quick check, of "Pyle," the bird banding manual/bible, indicates that these
SY males molt from the SY plumage to the ASY (after second-year = adult male)
plumage during their second fall (in this case in a few months; fall 2020)
rather than going back into a basic plumage that resembles a female.
Interestingly, it is these molt sequences that sometimes indicate which species
of birds are more closely related to one another.
Clear as mud?
b
-----Original Message-----
From: Stephen Tyson
Sent: Jun 6, 2020 9:26 AM
To: brainard@xxxxxxxxxxxxxx
Subject: Re: [birdky] Re: Orchard Oriole question
Thanks Brainard. Here’s a snapshot from The Gospel According to Sibley. I
assumed that “1st summer” meant their hatch year. I guess, I am confused
about what that means in birding literature, or I’ll have to finally face the
notion that even the most hallowed Scripture, may be fallible.
slt
On Jun 6, 2020, at 7:44 AM, brainard@xxxxxxxxxxxxxx wrote:
They certainly do pair and breed.
bpb, Louisville
-----Original Message-----
From: Jeff Sole
Sent: Jun 6, 2020 8:34 AM
To: Steve & Debby Tyson
Cc: bird ky
Subject: [birdky] Re: Orchard Oriole question
Interesting. We have a juvenile plumage male Orchard Oriole also actively
singing around our yard. I assume they will breed if they attract a female.
Oddly, there is an adult male also in the same general area, but I see it less
and it sings less often. I've never really seen them chase each other.
Jeff SoleHart County
On Sat, Jun 6, 2020 at 8:23 AM Stephen Tyson <kytysons9152@xxxxxxxxx> wrote:
Last weekend and again this morning, there is a male Orchard Oriole, in
juvenile plumage, singing and clearly defending territory around the house. He
acted like he would gladly thrash me, when I played his song back to him.
Does anyone know whether Orchard Orioles breed while still in juvenile plumage?
This seems odd, to me.
Stephen Tyson, Schochoh, Logan Co.NOTES TO SUBSCRIBERS
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