Re: Anna's hummers and migration (& range
expansion), I think there was a discussion on
OBOL last year re: Anna's being found "upslope"
(off the valley floor of the our interior valleys, etc.) more often.
I have definitely noted more Anna's off the
valley including relatively high elevations (~
4000 ft elevation) here in the Illinois Valley,
Josephine County. This includes male breeding
display behavior and included dates during common
nesting season. At our place near Takilma and
off the valley floor, Anna hummers used to be
found only occasionally but for the last 2
seasons, both male and female have been around
during spring early summer w/ males displaying.
There may be an upslope (post breeding
distribution) movement in some areas. But Anna's
do seem to be hanging out higher earlier in the Illinois Valley area.
Romain
At 08:25 AM 2/5/2016, Dennis Vroman wrote:

Anna's do seem to disperse. When I was banding
at Bear Camp (Curry Co), at what was the highest
elevation area in that part of the coast range,
a few Anna's Hummers were captured late enough
in the summer that they were likely
"migrants." They didn't nest at the site, or
nearby, as far as I was aware. There were
Rufous in the area, however, but they numbers
really increase after the fledgling started to disperse.
Dennis
----- Original Message -----
From: <mailto:acontrer56@xxxxxxxxx>Alan Contreras
To: <mailto:davidcbaileyoregon@xxxxxxxxx>David Bailey
Cc: <mailto:obol@xxxxxxxxxxxxx>OBOL
Sent: Thursday, February 04, 2016 10:01 PM
Subject: [obol] Re: Variation in Anna's Hummingbird abundance
Annaâs do seem to move around a bit, though I
am not sure that âmigrateâ is the right
word. I am not sure how their dispersal works.
Alan Contreras
<mailto:acontrer56@xxxxxxxxx>acontrer56@xxxxxxxxx
On Feb 4, 2016, at 9:55 PM, David Bailey
<<mailto:davidcbaileyoregon@xxxxxxxxx>davidcbaileyoregon@xxxxxxxxx> wrote:
Tim R,
Conventional wisdom would assert that Anna's
Hummingbirds do not migrate. That has been my
observation in NW Oregon. You have probably
considered that too. Since Anna's will nest
early in the year (and midwinter), I suppose
early fledgling could account for an influx in
the numbers at a specific feeder or area. Could
you shed some light on your statement of Anna's
Hummingbird migration. Perhaps I have been in the dark about this.
Respectfully,
David
David C. Bailey
Seaside, Oregon
Just one male Anna's visiting my one feeder currently.
