[Tweeters] California scrub jay - Wikipedia

[HAL MICHAEL via Tweeters]

At my previous location, south of Lacey, two out of about 20 Scrubs I banded were hatch-year birds.  More may have come to the feeders but weren't trapped.  Steller's, on the other hand, seem to have a lot more hatch-year participants.
 
Hal Michael
Board of Directors, Ecologists Without Borders http://ecowb.org/
Olympia WA
360-459-4005
360-791-7702 (C)
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> On 10/31/2025 10:38 AM PDT Robert O'Brien via Tweeters <tweeters at u.washington.edu> wrote:

>  

>  

> P.S.  And I don't believe I've ever had fledgling Scrubs come to these feeders.  The Steller's Jays, on the other hand, bring their fledglings immediately to the feeders, telling them You're on your own now, kids.

> 

> On Fri, Oct 31, 2025 at 10:33 AM Robert O'Brien <baro at pdx.edu mailto:baro at pdx.edu> wrote:

> 

> > Here 20mi SE of Portland in a rural area ,the Scrub/Stellar (sic) Situation is exactly the same as Steve Loitz states.  Exactly, and has been this way for 50 years.  We get Scrub Jays coming up to us from the residential areas along the Clackamas River only in the summer when the babies are demanding a lot of food and we have available feeders in a coniferous/mixed habitat..  Always overrun by Steller's Jays.

> > Bob OBrien  Portland

> > 

> > On Tue, Oct 28, 2025 at 8:01 AM Steve Loitz via Tweeters <tweeters at u.washington.edu mailto:tweeters at u.washington.edu> wrote:

> > 

> > > Ann, I have not seen any evidence that CASJs are pushing out STJAs in and around Ellensburg. There is little overlap of their respective habitats. Our CASJs are mostly in riparian zones and residential landscaped areas. STJAs tend to stick to areas with confiers. We have seen them on the same property, but no obvious antagonism. 

> > >  

> > > OTOH, CASJs may well be competition with Black-billed Magpies in some places in our areas. I have some bickering between those two species. 

> > >  

> > > YMMV on the Wet Side of the Cascades, of course.

> > >  

> > > Steve Loitz

> > > Ellensburg

> > > 

> > > On Mon, Oct 27, 2025 at 9:03 PM Ann Kramer <lens4birds at gmail.com mailto:lens4birds at gmail.com> wrote:

> > > 

> > > > I will be sad if the Steller's Jay's are pushed out of our area.  We are heavily forested with NGPA forests around, and I've only seen one Scrub Jay over the years.  The Stellar's come to the suet as a family unit, and they are the only brave enough to harass a Cooper's or Sharp-Shinned Hawk far from the busy feeders we have.  They are amazing to watch, as they work as a team to chase the Hawks and then quickly fly away, squawking, as it turns on them.  Such a lot of moxie!!!

> > > >  

> > > > Ann

> > > > 

> > > > On Mon, Oct 27, 2025 at 12:13 PM Steve Loitz via Tweeters <tweeters at u.washington.edu mailto:tweeters at u.washington.edu> wrote:

> > > > 

> > > > > CASJs are now in and around Ellensburg. A few years ago, it was rare to see one north of Yakima.

> > > > >  

> > > > > Steve Loitz

> > > > > Ellensburg WA

> > > > > 

> > > > > On Mon, Oct 27, 2025 at 11:45 AM Chuq Von Rospach via Tweeters <tweeters at u.washington.edu mailto:tweeters at u.washington.edu> wrote:

> > > > > 

> > > > > > On Oct 27, 2025 at 11:36:37, Stephen Elston via Tweeters <tweeters at u.washington.edu mailto:tweeters at u.washington.edu> wrote:

> > > > > > 

> > > > > > > I am regularly seeing California Scrub Jay in the Greenwood neighborhood of Seattle. The Stelars Jays still outnumber them significantly.   

> > > > > > >  

> > > > > > > 

> > > > > > 

> > > > > >  

> > > > > > For better and worse, Scrub Jays are quite good at expanding territory. Back when I was living in California there was an area I was monitoring regularly over a number of years, and over about a decade, we saw it go from being primarily a Stellar’s Jay area to Scrub Jay territory with only a couple of isolated Stellar’s families in the deeper wooded areas. I expect by now the Stellar’s have been completely pushed out. Scrub Jays keep more of a family unit going than Stellar’s, which I think gives them an advantage when competing for territory (much like Northern Mockingbirds do). The Scrub Jays adapt much more easily to suburban and urban environments. 

> > > > > >  

> > > > > > Chuq

> > > > > > 

> > > > > >  

> > > > > > ---------------------------------------

> > > > > > 

> > > > > > Chuq Von Rospach (http://www.chuq.me)

> > > > > > Silverdale, Washington

> > > > > > Birder, Nature and Wildlife Photographer

> > > > > > 

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> > > > >  

> > > > >  

> > > > > --

> > > > > Steve Loitz

> > > > > Ellensburg, WA

> > > > > steveloitz at gmail.com mailto:steveloitz at gmail.com

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> > > > 

> > >  

> > >  

> > > --

> > > Steve Loitz

> > > Ellensburg, WA

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