The delicate charm of a butterfly, with its fabulous fluttering wings and jewel-toned hues, is a sight to behold. Even so, you may have, at some point in your life, wondered if these colorful ...

From swallowtails to painted ladies, meet some interesting caterpillars you might find in your yard — and find out about the butterflies they'll become.

We can't get enough of the Red Admiral butterflies that have swept into New York City. Yesterday's beautiful weather meant that many were fluttering about in the sky—or taking the D train. We asked Dr ...

One warm, sunny afternoon early in May 2012, I had an experience in nature that stuck with me all these years. I was walking across a large lawn in Lancaster County that afternoon and suddenly saw a ...