Monarch Fall Roost
Sightings report image

Date: 09/12/2021

Number: 200

I saw a fall roost of butterflies in my trees.This was the second roost this year. I could not begin to count the number of butterflies that I saw in my trees. I have several different pictures I will put here.

[Data Verifier Note: contacted observer for more information about this sighting; photo and additional information contributed by observer, added by Journey North, 09/16/21]:

The roost formed on the 10th and went to the 13th of September. As for nectar sources I have a bunch of cone Flowers, Black eyed Susan’s and Phlox. And Hosta’s. The temps have been cool at night about in the mid 50’s to upper 60’s. The wind was out of the North. When that happened, they were in the South. When the wind was out of the South, they were in the North. We have a pretty wooded area that they can roost in. I do not know the different kind of trees we have. Some are Mulberry, and some are Walnut, and Silver Maple. I could not count every one because there was too many to count. My mom helped me. We just guest about 100-200. Mostly by counting them and estimating from that. I am still seeing a few Monarchs that average only about 5-7 a night.

Oakland, IA

Latitude: 41.3 Longitude: -95.4

Observed by: Bud
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