The Marsh Wren (Cistothorus palustris) is a small shy North American songbird usually less than 5 inches long and with a wingspan of about 6 inches. It is sometimes called a Long-billed Marsh Wren to distinguish it from the Sedge Wren, also known as Short-billed Marsh Wren. The male's song is a loud gurgle used to declare ownership of territory and they often sing both day and night.
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