: Jun-Aug with records from Northeast Creek, Upper Bass Harbor Marsh, and Schooner Head Marsh. No recent confirmed breeding records but could occur at any time.
: late Apr-late May with from early Apr and again late Aug-late Sep with to early Oct.
Miscellany: In 1968, a male Marsh Wren built multiple ‘dummy' nests in the cattails along the edge of Beaver Dam Pond but no certain female was seen and no eggs or young were found.
Last Reviewed: June 30th, 2026