This small island is located about 1.5 miles northeast of Great Chebeague Island.

Ornithological Summary

Upper Green Island was, at one time, home to one of the largest colonies of Double-crested Cormorants in the state, with a high of 500 breeding pairs documented in the mid-1980s.

Conservation Issues

This site is in conservation ownership. Overboard discharge from boats as well as an oil spill, in or around the bay, are considered the primary threats.


Owned by the Maine Dept. of Inland Fisheries and Wildlife and part of the Coast of Maine Wildlife Management Area, the island is closed to the public to protect nesting colonial water birds from April 15 through July 31 each year.

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