Harry
I have heard that as a possibility in low elevations of western Oregon. I had
almost posted it.
Jeff
On Sep 30, 2021, at 12:06 PM, Harry Fuller <atowhee@xxxxxxxxx> wrote:
likely multiple factors as nature does not often opt for simplicity:
1) Isn't our area similar to coastal California in that robins came down from
the mountains to nest as our forefathers changed the
environment putting in lawns, pastures, shrubbery. First nesting robin in
San Francisco was found in 1913, first Mocker in 1932.
2) Pesticides, hard on all ground-feeding species
3) Cats
4) Jays & crows
5) Squirrels
On Thu, Sep 30, 2021 at 11:44 AM larspernorgren <larspernorgren@xxxxxxxxx
<mailto:larspernorgren@xxxxxxxxx>> wrote:
I've noticed eastern gray squirrels here in the Brooklyn neighborhood. 50
years ago they were in Salem, but neither Eugene nor Portland, where
non-native fox squirrels have long been abundant. What about Steller's Jay's?
There is some consensus they have colonized large areas of Corvallis where
they were formerly absent. Sometimes l get a similar impression in Portland's
eastside.
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: Jeff Gilligan <jeffgilligan10@xxxxxxxxx
<mailto:jeffgilligan10@xxxxxxxxx>>
Date: 9/30/21 3:24 AM (GMT-08:00)
To: boo <boo@xxxxxxxxxxxxx <mailto:boo@xxxxxxxxxxxxx>>
Subject: [boo] the suggestion that the absence of earth worms was a factor in
robin decline
I am stepping away from that theory. Although earth worms had not been
detectable for months, following the recent heavy rains, there were a lot in
some yards last night. That written, during the long hot summer, they would
not have been available. In the past I saw them all summer long. Despite
that, I think the causes are the crows and squirrels that were not formerly
present.
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--
Harry Fuller
author of: San Francisco's Natural History: Sand Dunes to Streetcars:
https://ecowise.wordpress.com/2017/04/20/sfnh/ ;
<https://ecowise.wordpress.com/2017/04/20/sfnh/>
author of Great Gray Owls of CA-OR-WA:
https://ecowise.wordpress.com/2015/05/08/the-great-gray-owl-book/ ;
<https://ecowise.wordpress.com/2015/05/08/the-great-gray-owl-book/>
author of Freeway Birding: freewaybirding.com <http://freewaybirding.com/>
birding website: http://www.towhee.net ;<http://www.towhee.net/>
my birding blog: atowhee.wordpress.com <http://atowhee.wordpress.com/>
