Returning to flight
CONCORD, N.H. – Two biologists crawled through a field thick with blueberry, black chokeberry, and scrub oak, searching for butterfly eggs the size of pinheads. Suddenly, one of them, Steve Fuller, thrust a hand into the air. “Found one!” he shouted. As his colleague, Heidi Holman, ran to his side, Fuller opened his hand to reveal a tiny white egg of the Karner blue butterfly, clinging to a twig. Eight years ago, it was impossible to find any sign in…