Date: 11/15/19 8:28 am
From: Carl Lundblad <carl.lundblad...> [ible] <ible-noreply...>
Subject: Re: [IBLE] And Then There Were...Three
Blue Jays move (presumably mostly out of Alberta) into (mostly north) Idaho
each year in the fall. Some years it's a few. Some years it's a lot.
This year happens to be a banner year with large numbers arriving
throughout Idaho, including in more places than usual, and some making it
as far south as northern Nevada, Utah, and southern Wyoming (below which
they bump up against the breeding population on the Front Range). Montana
is complicated because they have a breeding population (and some of our
winter birds may come from there), but they also receive an influx during
fall and winter. They are undoubtedly attracted to and facilitated by
feeders and urbanization. While there may have been a slow range expansion
over the last quarter century, this is much more a case of year-to-year
variation in an irruptive species than a directional trend. Most or all of
them will leave in the spring, although it wouldn't be surprising if a few
eventually began breeding in Idaho (probably initially following with a big
irruption year, like this).

Good Birding,

Carl Lundblad
Moscow, Idaho

On Fri, Nov 15, 2019 at 7:32 AM <lcarrigan_55...> [ible] <
<ible-noreply...> wrote:

> Since sunrise this morning, I've been watching 3 Blue Jays coming in to
> feed on both whole corn kernels & black-oil sunflower seeds. Oftentimes,
> with all 3 present at once.
> Given the reports this fall of Blue Jays, esp in E ID, I pulled my
> records. My only Steller's Jay sighting at our place along the Snake River
> was 10/8/2000, feeding in our dry overflow channel. First Blue Jay sighting
> was 5/16/2012 at the feeder. Then, last year, the one which overwintered,
> arrived on 10/21/2018 to the feeder.
> Makes for some interesting questions. Are we witnessing a fall irruption
> of Blue Jays? Or, do we have a front row seat to observing the range
> expansion of Blue Jays? Is providing a seed source through feeders aiding a
> range expansion? Would be interested in others' thoughts. Probably too
> early to draw firm conclusions, but interesting, nonetheless.
> My 3rd generation farmer buddy tells me his mom, who was a hobby birder
> used to see the occasional Blue Jay years ago, at the family homestead, a
> mile directly west of me. And, as an aside, until Starlings showed, Mt
> Bluebirds would nest all through this area...even in their mailbox once!
> The mailman had them nail a box up nearby, so as not to disturb the
> bluebirds. That would have been in the 1960's. A lot has changed since
> then.
> Brian Carrigan
> Blackfoot

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