Crow Patrol

Crow Patrol2021-07-15T09:24:07-04:00

THE 2021 CROW PATROL BLOG

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Crow Roost after dark!

Nov. 20, 2021; clear skies after dark, wind SE 5MPH, temp at 40F; sunset time 4:17PM Out on later Crow Patrol to confirm recent observations that the roost has consolidated again into one single location east of Rt. 495 O'Reilly Bridge. Views from south side of the Merrimack River starting at 1.5 hours after sunset with over 4,000 Crows [...]

November 20th, 2021|

Roost: streaming towards the roost

Mon. Nov. 15, 2021: mostly cloudy, wind W at 10MPH, 42F, sunset time 4:21PM Out on Crow Patrol and scouting out staging locations along Sutton Street in North Andover all the way up to the airport. Over 550 Crows are seen in this image below gathering in the western section of the airport, above the Lawrence wastewater treatment plant. [...]

November 15th, 2021|

Winter Crow Roost: back to one roost!

Conditions: overcast skies, wind SW 6MPH, temp at 47F; sunset time 4:22PM Out on Crow Patrol with initial scouting stops all along Sutton Street in North Andover while looking for Crow concentrations in staging areas. Only found small gatherings of Crows, including a group on the west side of buildings at 231 Sutton Street. Here we saw about 80 [...]

November 14th, 2021|

Winter Crow Roost: Counting Quiz!

Crow Counting Quiz #1! One aspect of this Crow roosting phenomenon is counting the large number of crows using the roost. By obtaining accurate and reliable numbers, biologists can better track changes in the size of winter crow populations, follow the timing and extent of winter migration, pin down specific roost locations each winter and over time, [...]

November 14th, 2021|

Crow Roosts: night vision optics!

Nov. 10, 2021: clear skies, wind NW 8 MPH, temp 54F; sunset time 4:26PM Out on Crow Patrol after dark with first stop on north side of Merrimack River on both side of Mill240 building to observe Crows already settled in the roost. More than 125 Crows in this image, were perched in trees to the west of the [...]

November 10th, 2021|

Winter Crow Roosts: both locations after dark!

Nov. 8, 2021: clear skies, calm, temp at 55F; sunset time 4:28PM Out on Crow Patrol with initial stops along Merrimack Street near the Casey Bridge, and then up to the top of the McGovern parking garage. Great views looking westward at both the incoming flight stream of Crows, as well as Crows gathering on the ground, railroad tracks, [...]

November 8th, 2021|

Winter Crow Roost #2!

Clear skies and light winds; sunset time 5:34PM As the numbers in the roost area around the New Balance factory building are much lower than normal, thought it might make sense to explore for other roost locations. Discovered a great deal of action on the east side of the Rt. 495 Bridge in location of last year's overnight roost. [...]

November 3rd, 2021|

Crow Patrol: roof and flight action

Nov. 2, 2021: overcast skies, wind SW 5MPH, temp 53F; sunset time 5:25PM Out on Crow Patrol along Merrimack Street with first stops around the south end of the Casey Bridge area. Next stop was atop the McGovern parking garage as the Crows assembled on the far roof, at the west end. In this image we tally over just [...]

November 2nd, 2021|

Winter Crow Roost: images after dark!

Oct. 28, 2021: clear skies, wind NNE 4MPH, temp at 48F; sunset time 5:42PM Out on Crow Patrol with first stop at parking garage roof deck with views of gathering Crows on warehouse rooftop to the west. Just over 325 Crows observed from this image about 15 minutes before sunset time. Moved over to north side of Merrimack River [...]

October 28th, 2021|

Low elevation flight swirl!

Oct. 27, 2021: heavy overcast, wind NW 3MPH, temp at 49F, sunset time 5:43PM Out on Crow Patrol about 30 minutes before sunset time with Crows observed in staging areas on both sides of the Merrimack River. Primary vantage point was from north side of the river. Image below shows the Crows streaming into the general area around the [...]

October 27th, 2021|
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