Date: 09/17/2020

Number: 120

Our biggest numbers yet this season after previous nights of a few to a few dozen. Noticed the first individual come in around 5:15 p.m. and the last at about 7:10 p.m., ten minutes after sunset. There were two primary groups of around 25 each with several smaller clusters ranging from one to eight individuals. All groups were located on the south side of our windbreak, most likely due to the brisk north breeze. As with earlier roosts this season, groups are located higher up in the trees; most about 20+' high. Roosts are almost exclusively located on the mulberry trees, with a few smaller groups on arborvitae and white pine.
Plenty of nectar sources available nearby, including tithonia, goldenrod, sedum and zinnia, but no feeding seen by this evening's guests.
Winds were brisk from the north at 15 m.p.h. under mostly clear skies after a dry cold front passed through. Humidity was 57% with an air temp of 70F. Lows tonight expected to reach the 40's, with upper 30's forecast tomorrow night. Hopefully the mostly sunny skies will help to warm them along.

Bement, IL

Latitude: 39.9 Longitude: -88.6

Observed by: Thomas
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