Dr. Camille Parmesan, at the University of Texas, Austin, studies Edith's checkerspot butterflies (Euphydryas editha). As the climate warms, the butterfly's range is shifting north and to higher altitudes. In its southern range, 80% of populations are extinct. Why? The plants that the butterflies lay their eggs on are drying up before the caterpillars hatch, and the larvae starve.

"You may not care about butterflies, but the changes they are undergoing tell us a lot about climate change. This creature is telling us that global warming is affecting life right here, right now, in our own backyards."

Next piece of evidence:
Sea Turtles

Photo courtesy Camille Parmesan