Canyon Wren is similar to the Rock Wren but has a white throat and upper breast contrasting with its darker underparts and a longer bill. Bewick's Wren has a bolder supercilium and lacks contrast between the back and rump.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.