Scientists have found a new butterfly species in the south of China. It is the first known species of the family of large blue butterflies that lives in mountain forests.

An annual butterfly survey has shown that some species failed to thrive in the UK's hot summer after the country's worst-ever ...

Nevada has a new endangered species, and it takes expert eyes and perfect timing to spot it fluttering through the high mountain meadows west of Las Vegas. The Mountain Charleston blue butterfly ...

Reakirt's blue, Echinargus isola, is one of ten species of blue butterflies in the Front Range Reakirt's blue butterflies were moving among the flower heads of white clover in my lawn. I presumed that ...

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 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 Big Butterfly Count is part of efforts to track butterfly species after steep declines in the UK since the 1970s.

A rare inch long butterfly only found in South Florida has been added to the U.S. Fish and Wildlife Service's "Endangered Species" list.

This 93-year-old Xerces blue butterfly specimen was used in a study to prove it was once a unique species.

Wisconsin has 150 species of butterflies. Here's how you can see more of them.