长尾猴属（学名Cercopithecus），猴科的一属，产于非洲，大多数都生活在森林里。由于栖息地的日益减少，大部分长尾猴属的动物已受到生存的威胁，甚至濒临灭绝。

红尾长尾猴可跟青长尾猴混种，在非洲野外多处均有发现。

The guenons (/ɡəˈnoʊn/ or /ˈɡwɛnən/) are the genus Cercopithecus of Old World monkeys. Not all members of this genus have the word "guenon" in their common names; also, because of changes in scientific classification, some monkeys in other genera may have common names that include the word "guenon". Nonetheless, the use of the term guenon for monkeys of this genus is widely accepted.