How Far to Mexico from Fire Island, New York?

Also see: Wind Map for Saturday, September 15 >>
About this image:
There is long, narrow strip of land off the southern coast Long Island called Fire Island, New York (40.63 N, -73.34 W).
Last Sunday the monarchs put on a spectacular show there:

Sunday, September 16, 2007
"For about 2 hours while I was on the beach, looking in any direction there were butterflies visable, all heading west. I am sure there were hundreds, and possibly a few thousand butterflies that passed us as we sat at the beach. People were just standing and staring. It was quite amazing...I have never seen anything like it ever!"

An ocean island is a dangerous place for a monarch to be. The wind can easily blow a butterfly out over the ocean. In fact, the wind probably swept these monarchs to Fire Island in the first place. A strong northwest wind was blowing the day before, as this wind map shows. The wind blew all day! From where do you suppose the monarchs that were seen on Fire Island came? The distance these monarchs must fly to reach Mexico probably got longer due to this detour.

Image by Google

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