I was gone for 5 days and they drained all but one of the 7 feeders I had out. Total of about 3 liters of food. When I put out fresh feeders one of the females was guarding one from a perch in a maple across the yard and chasing away others. Did see two females feeding cooperatively at that feeder.
Latitude: 43.4 Longitude: -83.3
Observed by: Paul
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