Re: [cobirds] Massive murder of crows, Denver 1/15

[Patrick O'Driscoll]

Yes, most winter days near sunset, good numbers of those crows fly in from
the east side of Denver (and beyond?). They often fly directly over my
house just off East Colfax, about 4 miles east of the Capitol.
One recent evening I counted 805, another 529, all flying west to their
winter night roosts.
Their flyovers coincide roughly with official sunset and go on 15-20
minutes.
I had been wondering where they were ending up.

Coincidentally, I was recycling last week through a pile of bird-related
magazines and came upon a fascinating piece from a year or two ago about a
massive winter roost in Lawrence, MA, with more than 15,000 American and
Fish Crows nightly. They roost in various banks of trees around the area
but also "stage" before the roosting in parking lots of former industrial
mills, as well as on the frozen Merrimack River.
I can't find that article now, but a story in the local daily paper from
the same time went into considerable detail:
https://www.eagletribune.com/news/merrimack_valley/visit-of-15-000-crows-to-lawrence-fascinates-researchers-bird-enthusiasts/article_5624715a-cb01-5f0f-9ee1-e05e8dedc247.html

Good winter birding,

Patrick O'Driscoll
Denver



On Wed, Jan 19, 2022 at 8:52 PM Thomas Heinrich 
wrote:

> Not nearly as exciting as a Rufous-backed Robin (or perhaps the Civic
> Center Brant either), but over the last several weeks a mass gathering of
> American Crows has been occurring in downtown Denver late each afternoon
> (on the Auraria Campus on 1/15) and taking flight in a long stream winding
> through the buildings, destination: the US Bank building (I believe).  If
> you happen to be downtown for dinner, show, or a concert, it might be worth
> getting there a bit early for a stroll by the campus, or a glance upward
> around 5:00 pm to enjoy the spectacle.  On 1/15, I arrived at Auraria
> around 4:45 and watched until dark at about 5:30, counting 2,925 crows.
> eBird report with a few photos:
> https://ebird.org/checklist/S101066367
>
> Thomas Heinrich
> Boulder, CO
> nyc...@aol.com
>
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[cobirds] Massive murder of crows, Denver 1/15

[Thomas Heinrich]

Not nearly as exciting as a Rufous-backed Robin (or perhaps the Civic Center 
Brant either), but over the last several weeks a mass gathering of American 
Crows has been occurring in downtown Denver late each afternoon (on the Auraria 
Campus on 1/15) and taking flight in a long stream winding through the 
buildings, destination: the US Bank building (I believe).  If you happen to be 
downtown for dinner, show, or a concert, it might be worth getting there a bit 
early for a stroll by the campus, or a glance upward around 5:00 pm to enjoy 
the spectacle.  On 1/15, I arrived at Auraria around 4:45 and watched until 
dark at about 5:30, counting 2,925 crows.  
eBird report with a few photos:
https://ebird.org/checklist/S101066367

Thomas Heinrich
Boulder, CO
nyc...@aol.com

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[cobirds] Rufous-backed Robin present late 1/19

[Brandon]

Saw it from 345pm to 5pm at Denny Lake in Cortez, Montezuma County, near
the yards with red berries.  Thanks Coen and Brenda!

Brandon Percival and Van Truan
Pueblo County, Colorado

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