Cobb's Wren is endemic to the Falkland Islands. This species is similar to House Wren (T. aedon), which is very widespread throughout the Western Hemisphere, but Cobb's Wren is larger, with a stouter bill and tarsi, and its plumage is much more uniform in color and pattern. The most significant differences between Cobb's and House wrens, however, are behavioral. House Wrens typically adapt very well to human dominated landscapes, and often occur in parks and gardens. Cobb's Wren, in contrast, avoids human settlements entirely: it is most common in dense tussac grass near the high water mark behind boulder beaches, and it typically ;forages around or under large boulders in the littoral zone. Cobb's Wren breeds from October to December; its nest is a domed globular structure of grass, lined with feathers, and is placed among stems of tussac grass or in crevices.