• Log huts are coated in a fresh layer of snow

    Valley Forge

    National Historical Park Pennsylvania

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  • Upcoming Visitor Center Construction Projects

    Beginning April 22, improvements to the Visitor Center complex will be made and periodic closures will occur over a two-week period. Plan your visit with this information in mind. Further details and dates will be made available as possible. More »

Insects, Spiders, Centipedes, Millipedes

American Painted Lady Butterflies

American Painted Lady Butterflies

(photo credit:  Bill Moses)

Where there are forests, meadows, wetlands, or wide open spaces, there are sure to be insects. Insects, spiders, and other arthropods are present in healthy numbers throughout the park. One exception may be aquatic insect species adversely affected by industrial and residential runoff. Valley Creek passes through over 20 miles of developed land before reaching the park border, and nature pays the price as the water absorbs waste materials. Otherwise, amateur and expert entomologists alike will find countless species of butterflies, beetles, spiders, centipedes, and more to occupy their time. Insects are the most numerous life forms in the animal kingdom, and Valley Forge is no exception. Don’t be alarmed, however. If bugs are not your cup of tea, you won’t be overwhelmed by any swarms. In fact, you will probably only see a few passing butterflies unless you go looking for more.

In the mid-1990s, Jane Ruffin conducted a butterfly survey in the park and documented a great diversity of butterflies. Take a look at the park's butterfly checklist by clicking here or scrolling down to follow the link at the bottom of the page.

Did You Know?

Particpants of the Revolutionary Run Events

Valley Forge has 1.3 million visitors a year who enjoy the beauty, history, and trails and recreational resources of the Park. One third are regional repeat users.