Karner blue butterfly captive-rearing lab at the New Hampshire Army National Guard base

a series of three gray and white buildings next to each other with a sidewalk before them on a sunny blue sky day.

Karner blue butterfly captive-rearing lab at the New Hampshire Army National Guard base

These old military barracks at the New Hampshire Army National Guard base in Concord, New Hampshire are the site of innovative captive-rearing work to restore populations of the endangered Karner blue butterfly and other at-risk species. Mason Wheatley/USFWS

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Mason Wheatley/USFWS

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