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University of Massachusetts Medical School
Department of Neurobiology

  Steven Reppert (sketch); Monarch Watch (photo)

Since 2002, the laboratory of Steven M. Reppert has used anatomical, cellular, molecular, electrophysiological, genetic and behavioral approaches to more fully understand the biological basis of monarch butterfly (Danaus plexippus) migration, with a focus on the butterfly's navigational abilities and its distinctive circadian clock.

This website is intended as a resource and a gateway for monarch lovers of all stripes (and spots). Take a look around to learn about monarch biology and to discover the many open questions our lab continues to explore.