The Marsh Wren is a small brown wren with a striped back and a pale eyebrow. It lives in dense cattails, reeds and other tall marsh vegetation. The bird climbs between stems while searching for insects and spiders and is often detected by its rapid, mechanical song. Males build several dome-shaped nests, but only one or a few are used for breeding. Western populations usually have larger song repertoires than eastern birds.
Locations where this species is supported by a dated first record, an unambiguous single-place outing or a reviewed assignment.
