Isle Royale National Park

Lichen-covered rock and Lake Superior
A string of islands form the outside edge of Rock Harbor channel.


Isle Royale has always held an allure for those seeking adventure and solitude. Its unique isolation in northwestern Lake Superior also makes it a fascinating place to study ecology.

If it's too windy to get out on the water today, take a seat by the shore with one of our resource briefs or reports and see what we're learning about the Royal Island.

Resources Briefs are condensed versions of our technical reports. They rely on graphics and images more than dense scientific writing, but anyone who is intrigued and wants to know more can always use the resource brief as an entry into the report.

Source: Data Store Saved Search 3447 (results presented are a subset). To search for additional information, visit the Data Store.

These technical reports are produced by network staff and other scientists working on Isle Royale. Lots of information, lots of fascinating discoveries.

Source: Data Store Saved Search 3448 (results presented are a subset). To search for additional information, visit the Data Store.

A collection of different sizes and shapes of dragonfly larvae. Most are brown, some are light green.

Kristofer Rolfhus/University of Wisconsin-La Crosse

Dragonfly Mercury Project

Find out the latest about mercury and dragonfly larvae at your park!

As a foundational part of the aquatic food web, dragonfly larvae we collect each summer are tested for mercury in the environment, which helps us understand mercury contamination at higher levels of the food web.

Visit the website below to find the latest "dragonflier" for Isle Royale.

The Dragonfly Mercury Project Annual Data Fliers (


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    Last updated: October 4, 2023