: to . Breeds May-Aug in mostly small, scattered colonies along the eastern, southern and southwestern sides of MDI, and around Schoodic Point. Large colonies occur on Great Duck Island (about 400 pairs) and Little Duck Island (120 pairs). Birds are often in the vicinity of their breeding areas several months before nesting commences. in the upper parts of Blue Hill Bay and Frenchman Bay. No records from fresh water.
Miscellany: Black Guillemots are unusual alcids in several respects. They don't migrate (at least in our area), remaining all year within a few miles of their breeding sites, and they have dramatically different winter (whitish) and summer (black with white on the wings) plumages. In some years, one can see the first black Black Guillemots as early as late Feb.
You can learn more about Black Guillemots and see images here.
Last Updated: September 26th, 2022