Elusive purple emperor butterfly sighted at National Trust estate - The purple emperor, with a wingspan of around 8cm, was sighted at Sheringham Park in Norfolk in June during a weekly survey.

The Purple Emperor is one of Britain's most elusive butterflies. But its beauty disguises gruesome habits.

The story goes: Monarch butterflies are noxious to potential predators because of the cardenolide toxins lacing their body, courtesy of the milkweed plants the larvae fed on. Viceroy butterflies have ...

Scientists turn a brown butterfly purple—in just six generations Structural and pigment changes combine to turn brown into purple.

Clouds of yellow sulphur butterflies have been feasting on and swirling about the Purple on Purple Mexican bush sage, creating a complementary feast for the eyes.

A "conservation success story" has seen a British butterfly species coaxed in to a new county. The purple emperor is a relatively common sight in the south of England but until last summer was ...