: . Jun-Jul in waters.These lingerers typically retain their winter plumage. Unrecorded Aug-Sep.
: early Nov-late Mar along the with to late May. Occasionally easterly storms bring weakened individuals into protected coves and harbors. Most murres close to shore have been Thick-billed but that may change with the increasing number of Common Murres summering at Petit Manan Island and elsewhere in the western Gulf of Maine.
Miscellany: Thick-billed Murres regularly dive to depths of 300 feet and have been caught in nets set at 600 feet. Their single chick leaves its far northern cliff nest site only a quarter grown and flightless, and swims with its father who provides food for up to eight weeks.
Last Reviewed: August 6th, 2026