Loudly vocal, busy and skulky. Common in the East, usually in dense vegetation, or in backyard brush piles. Medium-size with rufous-brown back and orangey underparts; long white supercilium (eyebrow) and long, curved bill. Cocks tail up when foraging, down when singing their variety of songs. Usually exploring close to the ground; main diet is insects, but may be attracted to feeders (especially suet). Pairs form for life and sing and defend territory year-round (birds heard singing in winter are often Carolina Wrens); often build multiple nests, 3-6 feet off the ground. Lifespan up to 6 years. Population ~ 14 million and increasing, with some northerly expansion (although populations decrease in cold winters).