The 5” tall marsh wren is typically found in fresh-water marshes among cattails, where they can be seen bouncing among the reeds, occasionally moving to the top of a stem for a quick look around. There, the males sing their reedy song, which ends in a rasping chatter, in defense of their nesting territory. Sometimes marsh wrens will build up to 20 dummy nests, helping to ensure the raising of their young. While most nests are never used, adult birds have been known to sleep in some of them during the other seasons. The diet of the marsh wren consists primarily of insects, spiders and sometimes snails.