It’s a perfect summer morning on the island-a sunrise over Lake Superior, a cool breeze to keep the mosquitoes at bay, and a symphony of birdsong. Life is grand.
The National Park Service has monitored songbird populations on Isle Royale since 1994. The variety of habitats found in the islands provide nesting areas for 89 species of songbirds. Surveys are conducted in June during the first four hours of daylight. Observers spend five minutes at each of 130 survey points distributed along eight park trails including Passage Island.
Source: U.S. Department of the Interior, National Park Service
