Monarch Fall Roost

Date: 09/04/2020

Number: 613

Mark counted 613 in two roosts at Goose Pond Sanctuary - W7503 Kampen Road, Arlington. Clear, calm, 54 degrees. Winds on Sept. 4 from noon to 6:00 p.m. were NW at 9 mph and calm after that.

Roost Count at the Kampen Road residence - one that has been counted in past 7 +- days. 7:12 a.m. to 7:25 a.m. (on 9/5/20) 533 monarchs - 160 on the far east side of the east white pine; 360 just west of the powerline opening and on the SE side. Also 1 on the north side of the spruce (east half), 2 in a 12 foot tamarack in the back yard and 10 in a silver maple in the backyard near the spruce trees.

I also did a roost count in a spruce/white cedar cover unit running north and south that is .28 miles directly north of the roost at the residence. 7:30 to 7:43 a.m. 80 monarchs - 50 in the spruce on the south and southeast corner. 30 on the north end of the cover unit but on the east side.

I also counted 50 driving around two prairies (Wood Family Prairie - 18 in .67 miles) and Browne Prairie (32 in .78 miles). Drove the prairies from 7:30 a.m. to 8:03 a.m. Assumed most of the butterflies in the prairies roosted in the prairies overnight. NOTE: the 50 monarchs in the prairies were not part of the 613 in the two roosts.

Town of Arlington, WI

Latitude: 43.3 Longitude: -89.4

Observed by: Mark and Sue
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