Campbell’s work centers on the Karner blue butterfly, an endangered species in New York and nationwide, which can only eat blue lupine as a caterpillar. Wild lupine is a perennial that grows ...

The endangered Karner blue butterfly has struggled with habitat loss. U.S. Fish and Wildlife Service ...

Steven P. Campbell, a study co-author who has been monitoring the Karner blue butterfly in Albany, said in an interview last week that butterflies serve as an indicator of the state of the ecosystem.