Date: 09/03/2015

Number: 50

We first notice small groups of 2s or 3s seem to swarm together and then roost on our silver maple trees. The sky seems to swirl with them. Last night there was probably 50 to 100 of them.

Editor's note: We've re-dated this report from 9/04 to 9/03, the night the roost formed.

Belle Plaine, MN

Latitude: 44.6 Longitude: -93.7

Observed by: Susan
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