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Monarch Fall Roost
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Date: 08/21/2018

Number: 3000

The number is an estimate. I would say at least 2-3000 were around that day, and nearly that many for the following several days. On the 21st, conditions were cloudy and cool, so likely perfect for them to stay huddled in the trees later into the day. There were at least 400-500 just in one Garden space, mostly clustered on a few branches of a River Birch. There were at least 100+ on the nearby Arborvitae, 200+ on the nearby lindens, another several hundred on the Ash trees in an adjacent Garden space, 400+ in the Willow trees to the west, 300+ in the Ash trees near the Lilac Collection, and hundreds/thousands in the trees in the Arboretum. All throughout the day gardeners reported large numbers of them in other spaces as well, many still roosting and others fluttering around beginning to nectar. We have continued to see many in the flowers every day through today (August 30).

Brookings, SD

Latitude: 44.3 Longitude: -96.8

Observed by: Christina
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