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How Does the Monarch Migration Work?

11 years ago

I'm not an expert on anything butterfly related, but I've been raising milkweed and Monarchs for more than ten years. During that time I've read many articles about the migration, and the scientific literature all claims that the butterflies that are headed to Mexico are in some non-reproductive state, because they are saving their energy for the flight, the overwintering, and the partial return flight next spring. Once they accomplish all of that, then they start laying eggs. But, I'm hearing from friends on this forum (Sherry) that those of you in more southern regions get a late generation that seems to be eggs layed by the butterflies on their return trip. I wonder if some of the initial spring eggs hatch and grow up, but don't continue moving north. Instead, they hang around where they are, or move east/west, so they arrive in some southern areas later, but are still in egg-laying mode. Does anyone else have ideas of how this can happen?

Martha

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