The Carolina wren (Thryothorus ludovicianus) is a common species of wren found in the eastern half of the United States, the extreme south of Ontario, Canada, and the extreme northeast of Mexico. Their preferred habitat is in dense cover in forests, farm edges and suburban areas. However, Carolina wrens are wary, and are more often heard than seen This wren is the state bird of South Carolina.
There are seven recognized subspecies of the Carolina wren each with slight differences in song and appearance. The Carolina wren is 12.5 to 14.0 cm (4.9 to 5.5 in) long, with a 29 cm (11 in) wingspan and a weight of about 18 to 23 g (0.63 to 0.81 oz). It is the second largest wren in the United States after the cactus wren. Carolina wrens raise multiple broods during the summer breeding season. This photograph captures the elusive wren enduring a winter snowstorm in Belmont, Massachusetts.