Monday, June 9, 2025

New Exhibit at the State Library: The Spongy Moth Infestation in Massachusetts and Beyond

The State Library of Massachusetts is pleased to announce our latest exhibit: The Spongy Moth Infestation in Massachusetts and Beyond, now on view outside the Library’s entrance. This exhibit highlights the history, impact, and management of one of the Commonwealth’s most destructive forest pests. 

Formerly known as the gypsy moth, the spongy moth (Lymantria dispar) is an invasive species with deep roots in Massachusetts history. First introduced to the state in the late 1860s, this insect has caused widespread damage to forests and landscapes for more than a century. Known for its destructive caterpillars that strip trees of their leaves, the spongy moth remains a threat to local ecosystems during periodic outbreaks.

This exhibit traces the story of the spongy moth in Massachusetts, from its accidental arrival to modern-day control efforts. Visitors will find historical documents, scientific illustrations, photographs, and state reports that show how the Commonwealth has monitored and responded to this pest over time.

Whether you're a nature enthusiast, a history lover, or simply curious about one of Massachusetts' most notorious insects, we invite you to explore this fascinating and impactful chapter of our state’s environmental history.

View the exhibit during our open hours, Monday through Friday, 9:00 to 5:00. You’ll find it in the hallway outside of the Library (room 341 of the State House). This exhibit is on display now through September, so be sure to visit us to learn more about the spongy moth’s impact on Massachusetts and beyond.


Exhibits Working Group