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A single monarch butterfly can lay hundreds of eggs. For example, in Dr. Jim Edson's lab, one monarch laid 326 eggs in 2007 and another monarch laid 758 eggs in 2006. That was a record! What would happen if every egg survived? Let's see how many monarch generations it would take to reach a billion butterflies. Photo by Dr. Jim Edson This Season Teachers Kids Orientation Registration Search Copyright 1997-2009 Journey North. All Rights Reserved. Questions or comments? Contact us.