Dr  Theresa Pagano, a biologist, has found that the checkerspot butterfly is becoming more prevalent in regions farther north than before and less prevalent in regions farther south  The northward shift of the butterflies is almost perfectly correlated with the northward shift of the warm zones in the global climate, and Dr
Pagano has ttherefore concluded that the changing climate is responsible for the northward movement of the butterflies
Climate does not affect checkerspot butterflies themselves directly, but the plants they depend on thrive best in warm climates.