At 7-9 inches long, the Cactus Wren (Campylorhynchus brunneicapillus) is the largest wren in North American wren.

The Cactus Wren is easily seen and is less shy than most other wrens. It has the same loud voice characteristic of wrens, however it has a harsh and unmusical song. It has a slightly curved bill, brown head with a white eyestripe, barred wings and tail. The tail feathers are spotted which makes it easy to identify. There is little difference between the male and female of the species.