Date: 09/04/2020

Number: 300

Roosted in cedar trees.

I first became aware of it on Sept 4.

The number was an estimate. The butterflies were in 3 or 4 trees. There were numerous separate clusters averaging about 15-20 butterflies.

There is considerable goldenrod and some asters nearby.

Overnight low temp was approximately 9 Celsius

Early morning wind about 20 Kph from the south. The roost was relatively sheltered.

Northern Bruce Peninsula, ON

Latitude: 45.2 Longitude: -81.6

Observed by: David
Contact Observer

The observer's e-mail address will not be disclosed.
Contact will be made through a web-based form.