Most of us have heard of such butterflies as the Monarch or Painted Lady. But what about the Fender's Blue? Or the St. Francis' Satyr? From his firsthand experiences, ecologist Nick Haddad describes the challenges of tracking these vanishing butterflies, why they are disappearing, and why they are worth saving. Urging a more aggressive approach to conservation, Haddad also provides startling insights into the effects of human activity and environmental change on the planet's biodiversity.