With restoration efforts, one Karner blue population in the Albany Pine Bush Preserve in New York rebounded from a few hundred individuals in the early 1990s to thousands of butterflies.

Work to preserve the pine barren and population monitoring has seen the local population of Karner blue butterflies grow from as few as 200 individuals to as many as 10,000 to 20,000 Pollinator ...

The Karner blue butterfly is one of many species of butterflies that depend on specific host plants. Because the caterpillars only feed on blue lupine plants, they depend on hatching at the right ...

The Karner blue butterfly is one of many species of butterflies that depend on specific host plants. Because the caterpillars only feed on blue lupine plants, they depend on hatching at the right ...

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

“There’s also quite a few other rare butterflies” at the site ... smaller patches,” which is what’s happening at the Karner Blue Sanctuary, she said. Crosthwaite said the site’s ...