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Monarch Fall Roost

Date: 09/10/2020

Number: 25

After a day of spotting several individuals flying high overhead in a SSW direction, I'd say the leading edge of the Fall migration has reached central Illinois. Beginning at around 5:30 p.m. and continuing until around 7:00 p.m. (sunset at 7:10 p.m.), individuals arrived and lit on various species of trees, predominantly arborvitae, silver maple, hackberry and bald cypress. Most would check out a few spots before deciding on their final resting place. All were at least 10' off the ground with some as high as 20'-25', which seems higher than in previous years. All were on south and west facing branches and only a few gathered in pairs or threes that I could see. Weather conditions were perfect with an east breeze of 7 mph, temperature of 73 F and mostly cloudy. Humidity was 84% and the area was still damp from recent rains. Still too few and too high up to get any good pics.

Bement, IL

Latitude: 39.9 Longitude: -88.6

Observed by: Thomas
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