The Fender’s blue butterfly has fluttered away from the brink of extinction. The species, once so rare it was thought to be extinct, is no longer considered endangered, according to a January 11 ...

The insect, the Xerces blue butterfly, died out in the mid-20th century as a result of pronounced habitat loss, according to the Florida Museum of Natural History. Its extinction raised awareness ...

It’s been roughly 80 years since the Xerces blue butterfly was last spotted flitting about on pastel wings across coastal California sand dunes. But scientists are still learning about the insect.

More than eight decades ago, a mesmerizing butterfly with iridescent cobalt wings and stunning spots called the Xerces blue vanished from San Francisco. When it disappeared, the Xerces became ...

New research suggests the iconic Xerces blue butterfly may have been its own species. By Sabrina Imbler More than a century ago, a bluish butterfly flitted among the sand dunes of the Sunset ...

In 1976, the El Segundo Blue Butterfly became the first ever insect on the federal endangered species list. Today, it numbers well over 100,000. Over 25 years ago, the El Segundo Blue Butterfly ...