Biologist Jana Johnson

Biologist Jana Johnson watches newly emerged Palos Verdes blue butterflies in their breeding cages at Moorpark College. Last spring, only an estimated 220 of the species existed in the wild, so few that experts feared they could be wiped out by a single wildfire.

( Brian Vander Brug / Los Angeles Times )

Biologist Jana Johnson watches newly emerged Palos Verdes blue butterflies in their breeding cages at Moorpark College. Last spring, only an estimated 220 of the species existed in the wild, so few that experts feared they could be wiped out by a single wildfire.

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