title: Monarch butterfly migration in North America: Controversy and conservation.
abstract: The monarch butterfly is the most spectacular example of insect migration known. Monarchs are threatened by the destruction of their over-wintering sites in Mexico, California and elsewhere, and many efforts are being made to conserve these sites. However, a controversial recent suggestion, that some monarch populations may not migrate at all, has jeopardized some of these efforts. This article assesses the evidence for and against the new suggestion.
authors.affiliation: Stephen Malcolm is at the Dept of Zoology, University of Florida, Gainesville, FL 32611, USA.
authors.forename: S B
authors.initials: SB
authors.lastname: Malcolm