Notes on a Large Dragonfly and Butterfly Migration in New Jersey

We report our observations of a large migratory flight of monarch butterflies (Danaus plexippus L.) and dragonflies (Anax junius Drury, Tramea lacerata Hagen) in central New Jersey and review what is currently known about these migratory movements in eastern North America. The migration followed the passage of Hurricane Floyd, one of the strongest coastal storms to cross New Jersey during the twentieth century. Our observations suggest that weather conditions associated with this storm may have signaled the onset of the migration we recorded.