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 <[email protected]> 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 > [email protected] > > -- > -- > You received this message because you are subscribed to the Google > Groups "Colorado Birds" group. > To post to this group, send email to [email protected] > For more options, visit this group at > http://groups.google.com/group/cobirds?hl=en?hl=en > * All posts should be signed with the poster's full name and city. Include > bird species and location in the subject line when appropriate > * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ > --- > You received this message because you are subscribed to the Google Groups > "Colorado Birds" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/cobirds/DB5201B5-A25D-4E99-9A24-33F652560940%40gmail.com > <https://groups.google.com/d/msgid/cobirds/DB5201B5-A25D-4E99-9A24-33F652560940%40gmail.com?utm_medium=email&utm_source=footer> > . > -- -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/cobirds?hl=en?hl=en * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ --- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/CAMNEzJN8nvGwobLrpSucdWZg9RXnNkVH2W9%2BF9mJ7xsjLh3gqQ%40mail.gmail.com.
