Pesticides, habitat loss, and light pollution are threatening firefly populations worldwide, but even in urban areas, some ...

In one sense, it’s odd to associate any firefly with youth, for by the time we see them lighting up our nights, they are ...

After struggling over the last few years, the Chicago area's firefly population seems to be enjoying a "pretty good year," ...

North American Male Photinus Flash Patterns (From Lloyd 1966, modified for clarity and used with permission, illustrations by A. Zych): Photinus pyralis The flight path of P. pyralis is vertically ...

"The Photinus pyralis is called the 'Big Dipper.' It got the name because they dip when they flash. It's what you probably caught in your yard if you were chasing and catching fireflies.

But few would guess that the common eastern firefly (Photinus pyralis) is one of more than 2,000 firefly species worldwide. Of those species, ...

When the sun falls below the horizon, a skinny beetle named Photinus pyralis wakes up and takes to the air. We know it as the firefly, or lightning bug, an insect that transforms the sultry summer ...