This week's northernmost sighting was in Louisville, KY. It is 1,000 miles northeast of the point in Texas we are considering to be the center of the monarch's pathway into the U.S. from Mexico.
The orange arc on the map above shows where monarchs would be now if they had spread equally in all directions upon entering Texas. Had they flown directly northward, for example, they would be in South Dakota now!
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Why are the monarchs going to the northeast? Think about this question, then explore more! >>
* For the purpose of measuring from a single point, we are using Eagle Pass, Texas as the center of the monarch's pathway into the U.S. from Mexico. We are assuming that the monarch's spring migration pathway matches the better-known fall migration pathway.