What is "marsh wren"

Marsh \Marsh\, n. [OE. mersch, AS. mersc, fr. mere lake. See Mere pool, and cf. Marish, Morass.] A tract of soft wet land, commonly covered partially or wholly with water; a fen; a swamp; a morass. [Written also marish.] Marsh asphodel (Bot.), a plant ( Nartheeium ossifragum) with linear equitant leaves, and a raceme of small white flowers; -- called also bog asphodel. Marsh cinquefoil (Bot.), a plant ( Potentilla palustris) having purple flowers, and found growing in marshy places; marsh five-finger. Marsh elder. (Bot.)

1. The guelder-rose or cranberry tree ( Viburnum Opulus).

2. In the United States, a composite shrub growing in salt marshes ( Iva frutescens). Marsh five-finger. (Bot.) See Marsh cinquefoil (above). Marsh gas. (Chem.) See under Gas. Marsh grass (Bot.), a genus ( Spartina) of coarse grasses growing in marshes; -- called also cord grass. The tall Spartina cynosuroides is not good for hay unless cut very young. The low Spartina juncea is a common component of salt hay. Marsh harrier (Zo["o]l.), a European hawk or harrier ( Circus [ae]ruginosus); -- called also marsh hawk, moor hawk, moor buzzard, puttock. Marsh hawk. (Zo["o]l.)

   1. A hawk or harrier ( Circus cyaneus), native of both America and Europe. The adults are bluish slate above, with a white rump. Called also hen harrier, and mouse hawk.

   2. The marsh harrier.

      Marsh hen (Zo["o]l.), a rail; esp., Rallus elegans of fresh-water marshes, and Rallus longirostris of salt-water marshes.

      Marsh mallow (Bot.), a plant of the genus Alth[ae]a ( Alth[ae]a officinalis) common in marshes near the seashore, and whose root is much used in medicine as a demulcent.

      Marsh marigold. (Bot.) See in the Vocabulary.

      Marsh pennywort (Bot.), any plant of the umbelliferous genus Hydrocotyle; low herbs with roundish leaves, growing in wet places; -- called also water pennywort.

      Marsh quail (Zo["o]l.), the meadow lark.

      Marsh rosemary (Bot.), a plant of the genus Statice ( Statice Limonium), common in salt marshes. Its root is powerfully astringent, and is sometimes used in medicine. Called also sea lavender.

      Marsh samphire (Bot.), a plant ( Salicornia herbacea) found along seacoasts. See Glasswort.

      Marsh St. John's-wort (Bot.), an American herb ( Elodes Virginica) with small opposite leaves and flesh-colored flowers.

      Marsh tea. (Bot.). Same as Labrador tea.

      Marsh trefoil. (Bot.) Same as Buckbean.

      Marsh wren (Zo["o]l.), any species of small American wrens of the genus Cistothorus, and allied genera. They chiefly inhabit salt marshes.

n. a wren of the genus Cistothorus that frequents marshes

The marsh wren (Cistothorus palustris) is a small North American songbird of the wren family. It is sometimes called long-billed marsh wren to distinguish it from the sedge wren, also known as short-billed marsh wren.