Date: 10/29/2017

Number: 117

I counted 117 butterflies flying in a span of 50 minutes (an average of 23 butterflies every 10 minutes). They follow the slope of the mountain range, towards the southeast, to the south of Monterrey city, I noticed that they do not enter the interior of the mountains through the Huasteca Canyon (look at the red arrows on the image).

Santa Catarina, NLE

Latitude: 25.7 Longitude: -100.4

Observed by: Elsa
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