BUTTERFLY RESPONSES TO CLIMATE WARMING IN MASSACHUSETTS
FIGURE 14.28 The atlantis fritillary, Speyeria atlantis, which is near the southern boundary of its geographic distribution has been declining in abundance in Massachusetts. Meanwhile, the population of the frosted elfin, Callophrys irus, which is near the northern edge of its distribution, has increased 10-
(Barrett & MacKay/All Canada Photos/Getty Images); (Jeffrey S. Pippen, www.jeffpippen.com)