Date: 09/10/2019

Number: 240

Time of day you first saw the roost:
6:30 pm they started flying in and around the yard from the fields.

Date the roost first formed:
Last week we had roosts 3 days in a row, then no butterflies for a few days. Today we had a bunch show up. There was at least 6 roosts spread out on 60 trees with butterflies sprinkled in groups of 2 or 3.

Nectar sources nearby like clover, alfalfa fields or wildflowers:
Yes all of the above! We have hay fields and fields full of Goldenrod and also my pollinator gardens as we are a Monarch Waystation with Monarch Watch.

Overnight temperatures:
It is 71 right now, low projected at 65 tonight.

Wind direction. Were the monarchs shielded from the wind in this location?: Calm wind at the moment, we are on a ridge so very little protection from wind. The monarchs are all on my line of windbreak Hybrid Willows on the east sides of the tree line.

How you counted or estimated the number of adults roosting:
I counted them as best I could. We tried counting the butterflies in each of the roosts and the ones flying around and those that were sprinkled about in the tree line. Once we counted around 160 we started estimating. There had to be over 240 butterflies or more spread out over 60 trees.

Viroqua, WI

Latitude: 43.5 Longitude: -90.8

Observed by: Emily
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