The cactus wren (Campylorhynchus brunneicapillus) is a species of wren that is endemic to parts of the southwestern United States, as well as northern and central Mexico. There are eight generally recognized subspecies, and the nominate species has a brown crown, with notable white eyebrows that stretch to the nape of the neck. The wings and feathers are brown, but are marked with black and white spots. The tail, as well as certain flight feathers, are also alternatively barred in black and white. The chest is whiter, while the underparts are cinnamon-buff colored. Its song is harsh and raspy and has been described by ornithologists like a car engine that will not start.