The Zone-tailed Hawk looks remarkably similar to the Turkey Vulture with its dark plumage, wings held in a "v", long, narrow wings and tail, and flight feathers appearing paler than the wing linings. Note that the Zone-tailed Hawk has barred flight feathers, white bands in the tail, and a feathered head. The Common Black-Hawk lacks the barred flight feathers and has a more obvious white band in its shorter tail. There are several dark morph hawks that look similar to the Zone-tailed Hawk but lack the white bands in the tail and have different underwing patterns.
Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.