Barry Palevitz | Jul 4, 1999 | 6 min read
Global warming has a strong effect on butterfly populations. Camille Parmesan , assistant professor of integrative biology at the University of Texas in Austin, cares about butterflies, so she's concerned: Global warming is bugging her beloved insects. Three years ago, Parmesan reported that Edith's checkerspot butterfly had moved northward along the west coast of North America over the past century.1 Specifically, local populations were four times more likely to go extinct in Mexico, at the