There aren't enough to block out the sun, but social media posts out of the Lake Tahoe area show enough swarming butterflies to get just about anyone who encounters them to pull over and start taking ...

A flash of orange darted between blue broadleaf lupine, magenta paintbrush and pink-white mountain daisies before the small butterfly disappeared into the sky. “That’s another California Tortoiseshell ...

One of Britain's best-loved butterflies has suffered a "quite frightening" decline in numbers this summer. The numbers of the small tortoiseshell - one of Britain's most recognisable and widespread - ...

Thomas Werner's journey from East Berlin to the Keweenaw has been a metamorphosis. His work with fruit flies is giving researchers an avenue to explore for cancer screening, prevention, and treatment.

Millions of butterflies are dancing through the skies above the Lake Tahoe Basin, delighting locals and tourists alike. The species is called the California tortoiseshell (Nymphalis californica) and ...

SOME time late in last autumn, a tortoiseshell butterfly took refuge in a small bath room in this house, established itself on, the ceiling, and there remained, immovable, throughout the winter. On ...

THE male small tortoiseshell butterfly is fiercely defensive: throw a stick nearby and it leaps up like a Labrador retriever to attack it. The aptly named dingy skipper is the ugliest butterfly ...

Butterfly counts and flowering times shift earlier in warmer, low-snow years. Volunteers now lead Mt. Rainier surveys after federal research funding ended. Butterflies serve as effective indicators of ...