See what Baltimore checkerspot butterflies and caterpillars look like. Plus, learn which host plants you should grow to ...

The U.S. Fish and Wildlife Service said it is reopening the public comment period for a proposed rule to list the monarch ...

If the caterpillar is threatened, the fleshy, orange osmeterium pops out ... the parnassians are tail-less white butterflies with black marks and red spots. Most kinds live in the mountains ...

Butterfly populations in the US shrank by more than a fifth within the space of two decades, according to a new study.

Map Wing: A small white butterfly named for the map-like lines on its wings. Normally stays close to the ground because it seeks food from puddles. Great Orange Tip: A white butterfly with orange ...