How do male Marsh Wrens reduce competition for food in their territory?
He does this by destroying eggs and nestlings of neighboring birds. Otherwise, this species is a very secretive bird, even when singing the territorial song, the male remains hidden. Interestingly, males continue learning songs and will imitate songs in addition to his loud gurgling song.
A group is known as a “chime”, “flight”, “flock”, or “herd” of wrens.