Date: 08/22/2019

Number: 400

We've see many butterflies during August and September crossing the open water of Warner Bay on Lake Huron, and along the road, but this was the only night we found them roosting. They have roosted here in previous years in numbers much great than this.

Northern Bruce Peninsula, ON

Latitude: 45.2 Longitude: -81.6

Observed by: Peter
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