Monarch PEAK Migration

Date: 09/07/2020

Number: 600

Submitted by Don Davis: On September 7, 2020, noted birdwatcher Alfred Adamo reported that monarchs were streaming off of Gilbraltar Point on Centre Island, Toronto, at a rate of 20 per minute. Alfred noted that he observed this phenomenon over a period of abougt 1/2 hour. Alfred noted that monarchs were very abundant on the buddleia shrubs located in the formal gardens there. To the immediate east of the Toronto Islands is Tommy Thompson Park (also known as the Leslie Street Spit - a 5 km long man-made peninsula, created from building rubble and soil from developments in the City of Toronto. This now favorite recreational location is a mass of goldenrod and New England aster in the fall and monarchs are also abundant here. Milkweed is abundant here. This man-made park is now designated as an Important Bird area. This writer has tagged one monarch here which was later recovered in Mexico. Number of monarchs observed is an estimate based on the streaming rate.

Toronto, ON

Latitude: 43.6 Longitude: -79.4

Observed by: Donald A.
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