Following a bad year for butterflies in 2024, it’s more important than ever to take part in this year’s Big Butterfly Count.

As the climate warms, many species are shifting northward into areas that were previously too cold for them. A study, ...

It's a mystery how butterflies manage to make their brilliant wing colors, but Yale physicists got a glimpse when they took the question to the lab, breeding dull brown butterflies into purple ones.

What Does a Hackberry Emperor Look Like? What type of butterfly is this? asks reader Andrea Rickard of Helena, Ohio. Kenn and Kimberly Kaufman say, “This is a good view of the intricate pattern on ...

Wall brown butterflies adapt quickly through evolution as the climate warms and they shift northward. They grow faster and ...

When first seeing brown butterflies, many observers think they are moths. Drab-colored moths are very common, but, in our region during this month, we have four kinds of brown butterflies flitting ...

In just six generations of selection, they took a brown butterfly and shifted it to a rich, purple color. Turning a "brown bush" purple. The species chosen for this work was Bicyclus anynana, ...

Scientists found “large” brown butterflies living in the Andes mountains of Peru and discovered a new species, a study said. Photo from Pierre Boyer Over 15,000 feet up in the mountains of ...

Butterflies likely split from nocturnal moths around 100 million years ago in present-day western North America or Central America, a new study of the winged insects finds.

Scientists found “large” brown butterflies living in the Andes mountains of Peru and discovered a new species, a study said. Photo from Pierre Boyer Over 15,000 feet up in the mountains of ...

Inside Out looks at efforts to save one of the country's rarest and most threatened butterflies, the high brown fritillary. Since the 1970s national numbers of the butterfly have declined by 90% ...

This butterfly has brown spots on its upper wing, with four black markings on each wing, and the bottom wings are brown. Their larvae feed on grass, such as bottlebrush grass.