Date: 10/07/2019

Number: 600

600 monarchs per hour counted flying south west along the north shore of Lake Erie. Temp was 64 F, partly sunny with a light west wind. The west wind causes the butterflies to funnel along the shore line. The 600 per hour rate was observed at 11:00 AM. The rate slowly tapered off in the afternoon to 400 per hour at 2:00 PM and then 180 hour at 4:30 PM. Shortly after 4:30 PM an on-shore breeze developed (from the SE) which dispersed the butterflies in land making them no longer visible at the shore line.

Chatham-Kent, ON

Latitude: 42.5 Longitude: -81.7

Observed by: Steve
Contact Observer

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