Gossamer-wing Butterflies of North America - Distribution maps, species accounts, and photos of gossamer-wing butterflies (family Lycaenidae) of the United States and northern Mexico. www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/usa/gossamer.htm
Palos Verdes Blue - Short article about the endangered race of Silvery Blue, Glaucopsyche lygdamus palosverdesensis. www.wildlifewebsite.com/butterflies/pvblue.html
