The "Bay Checkerspot Butterfly" photographed at the Kirby Canyon Trust south of San Jose. Chronicle Photo by Michael Macor The Kirby Canyon Trust protects habitat for the bay checkerspot butterfly ...

The butterfly dwells within an 82 square mile range in meadows among the Sacramento Mountains in Lincoln National Forest. Sovereignty wins 157th Belmont Stakes, adding to Kentucky Derby title ...

Lands within Lincoln National Forest could be set aside for recovery of the Sacramento Mountains checkerspot butterfly, which was deemed endangered by federal wildlife managers earlier this year ...

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 ...

The butterfly dwells within an 82 square mile range in meadows among the Sacramento Mountains in Lincoln National Forest.

The Karner blue butterfly has been listed as "endangered" under the ESA since 1992. Creative Touch Imaging Ltd./NurPhoto via Getty Images Get the Popular Science daily newsletter💡 ...

Portrait of a Snowberry Checkerspot butterfly. Buddy Mays/Corbis/Getty Images Three populations, none of them anywhere near the margins of the species distribution.

The butterfly is known only to dwell in Otero County amid the Sacramento Mountains within the Lincoln National Forest in areas between 7,800 and 9,000 feet above sea level.

The Sacramento Mountains checkerspot butterfly will also see a critical habitat be designated for its recovery, after the U.S. Fish and Wildlife Service said it determined an endangered listing ...

The Sacramento Mountains checkerspot butterfly will also see a critical habitat be designated for its recovery, after the U.S. Fish and Wildlife Service said it determined an endangered listing ...

The butterfly is known only to dwell in Otero County amid the Sacramento Mountains within the Lincoln National Forest in areas between 7,800 and 9,000 feet above sea level.

Lands within Lincoln National Forest could be set aside for recovery of the Sacramento Mountains checkerspot butterfly, which was deemed endangered by federal wildlife managers earlier this year.