The plight of the Quino checkerspot butterfly has been described by a biologist as “four engines out and about 10 seconds to impact.” The Quino checkerspot was once one of the most common butterflies ...

The darling of famous biologist Paul Ehrlich, the Bay checkerspot butterfly has enjoyed plenty of scientific attention over the years. In fact, since 1960, its population size has probably undergone ...

A lawsuit filed by the Cleveland National Forest Foundation and California Native Plant Society claims the project threatens the endangered Quino checkerspot butterfly, western spadefoot (a toad), and ...

Edith’s checkerspot butterflies are found throughout western North America, but they don’t all look or act the same. Dozens of habitat-specific forms or ecotypes of the species have been documented, ...