Date: 7/9/18 11:34 am
From: Craig Tumer <craig...>
Subject: [obol] Re: Lawrence's Goldfinch
The male Lawrence's Goldfinch that spent some time near Sherwood in
Washington County last spring was very closely associated with a
female American Goldfinch.
Craig TumerPortland

-------- Original Message --------
Subject: [obol] Re: Lawrence's Goldfinch
From: "Wayne Hoffman" <whoffman...>
Date: Mon, July 09, 2018 11:11 am
To: "Alan Contreras" <acontrer56...>, "Lars Norgren"
<larspernorgren...>
Cc: "" <annegoffar...>, "" <obol...>

Hi -
This seems to be following the classic pattern of a bird expanding
its range poleward - "accidental" occurrences at long intervals,
followed fairly abruptly by a spate of more frequent occurrences,
and then evidence of "residency" such as territorial singing,
longer stays, occurrences of multiples, in this case breeding. I
think if we examined the early records of Anna's Hummingbirds,
Black Phoebes, Red-shouldered Hawks, Elegant Terns, Brown Boobies,
White-winged Doves, etc. we would see some notable similarities.
it's important to realize that in general, range expansions are
driven as much by stuff going on in the source areas as by stuff
happening in the new areas. Obviously, for species to become
established, the habitat needs to be suitable, but the immigrants
did not come because of the habitat quality - they came b ecause
they were getting crowded st home, or summers were getting too hot
or too dry, etc. [Black-throated Sparrows are more common in the
northern parts of their range in drought years in their core
range.]
Range expansions of native birds in continental habitats seldom
result from a single "dispersal event" followed by proliferation
of those initial colonists. Instead they are fueled by a pattern
of straying/migration from the historic species range. Results
vary for island colonizations and for exotics like Eurasian
Collared-Doves, Starlings, and House Sparrows.
Back to Lawrence's Goldfinches: It would be great to get photos
of this family, to make sure the female is also a Lawrence's. It
would not shock me to see a lone male Lawrence's playing house
with a female Lesser, or even American, goldfinch. - Following the
Stephen Stills rule: If you're not with the one you love...<
/div>
Wayne

On 7/9/2018 9:32:52 AM, Alan Contreras <acontrer56...>
wrote:Recent years have had multiple reports but this is first
breeding I know of. Of course I don’t know everything.

Alan ContrerasEugene, Oregon
<acontrer56...>
www.alanlcontreras.com


On Jul 9, 2018, at 9:30 AM, Lars Norgren <larspernorgren...>
wrote:

Are there previous confirmed breeding records? The number
of extra-limits records certainly seems up the past 2-3
years.lpn
On Mon, Jul 9, 2018, 9:25 AM <annegoffar...>
wrote:

I apologize if this posts twice. Tried to send from my
iPad and it isn't working.
Where: At the Provolt Pond in Josephine County.
Intersection of Williams Highway and Highway 238. Just
north of the "Welcome to Josephine County" line. Large
shrub with a branch overhanging the pond. Sitting on
the branch.
What: Five Lawrence's Goldfinches. Four babies,
begging, and one beautifully marked adult male. Black
face, bright yellow chest with gray/white belly, gray
back. Very distinct. Babies were fairly plain,
unmarked face, faded streaking on flanks fading to to
no markings in center of belly, yellow on outer wings,
stout-ish bill.

Anne <Goffannegoffar...>

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