The Fort Indiantown Gap military base in Lebanon County is home to the world's only surviving population of the eastern regal fritillary, a large butterfly that the U.S. Fish and Wildlife Service ...

At Fort Indiantown Gap in northern Lebanon County, a vast stretch of grassland houses the only population of the rare regal fritillary butterfly in the eastern United States. Several of these ...

Mt. Washington, the peak that is home to some of the world’s worst weather, is also home to a rare butterfly, recently rediscovered and now being studied by biologists who are hoping to find out what ...

The Glanville fritillary has long been an internationally known model species for ecology and evolutionary biology, whose population biology has been studied on the Aland Islands for more than 20 ...

Fall is the season of Gulf Fritillaries in the Lowcountry. These medium-sized orange butterflies are often confused with Monarchs (Danaus plexippus), but it’s fairly easy to tell the difference.

The rare regal fritillary butterflies have disappeared from nearly everywhere in the eastern U.S., as native grasslands have been destroyed and converted to other human uses. The once common species, ...

A record number of one of the UK's rarest butterflies has been found at a nature site. More than double the number of silk shelters were found at Lydlinch Common this year compared to last year, ...

Passion is a curious concept. It combines intensity and desire, in its purest sense, to create an obsessive need. There is, figuratively and literally, a fine and not always obvious line between ...

In a year when a “butterfly emergency” has been declared, one species in Northern Ireland is bucking the trend. The marsh fritillary made its presence felt in autumn, when the caterpillars spin ...