Pond Boss Forums INTRO Questions & Observations More good news about Monarch Butterflies

The article: "Their model also suggests a simple explanation why monarch butterflies are able to reverse course in the spring and head northeast back to the United States and Canada. The four neural mechanisms that transmit information about the clock and the sun’s position would simply need to reverse direction"
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Why, of course! So how is this done? What are the mechanisms that ensure the reversal happens when it should, in a butterfly descendant of the original insect? And keep in mind that not only is this a new individual, it has passed through a stage of being a caterpillar, and a chrysalis, two very different organisms than the final stage of butterfly.

No doubt some good science is being done, but the "simple explanation" assumes a can opener.