Due to chemicals, light pollution and other factors, fireflies are dwindling in numbers compared to a few decades ago.

Fireflies are harbingers of sweltering midsummer heat, but the regional renaissance is tied to conditions in the spring.

Philly's summer muggy weather is historic. We're seeing more fireflies around, so here's where to find lightning bugs, and a ...

Wisconsin Public Radio Kimberly Mackowski of West Allis recently took a walk at dusk through Wauwatosa’sForest Exploration ...

The global firefly population is on the decline, but a scientist at Michigan State University said she has seen more fireflies in Michigan this year.

Firefly season peaks in July. Here’s where to spot them in and around Philadelphia — and why you may be seeing more of their ...

Photuris pensylvanica — better known as the Pennsylvania firefly or, as most Philadelphians call it, the lightning bug — is out in full force this summer. Reports that central and rural parts of the ...

The flickering fields of summer nights are back. Fireflies, it seems, are abundant again. Throughout the region, people are ...

This summer has been a good year for viewing lightning bugs or fireflies because of several weather conditions. Here's what ...

A study published a year ago in Science of the Total Environment points to various environmental factors that could doom ...

According to Larson, firefly numbers are on the decline. However, it follows a larger pattern with insect life overall.

Another look at the latest population estimate data from the Census Bureau, this time concentrating on minority groups in the Lehigh Valley and all of Pennsylvania's counties.