Western long-tailed hornbill
The western long-tailed hornbill is a species of hornbill found in humid forests of West Africa. It was formerly considered to be conspecific with the eastern long-tailed hornbill with the English name "white-crested hornbill".
Taxonomy
The western long-tailed hornbill was formally described in 1848 by the American ornithologist John Cassin based on a specimen that had been collected near the Saint Paul River in Liberia. He coined the binomial name Buceros albocristatus. The specific epithet combines the Latin albus meaning "white" with cristatus meaning "crested" or "plumed". The species is now placed in the genus Horizocerus that was introduced in 1899 by the American ornithologist Harry C. Oberholser. The western long-tailed hornbill was formerly considered to be conspecific with the eastern long-tailed hornbill with the English name "white-crested hornbill".There are two subspecies, which differ primarily in the amount of white to their head and neck and the presence or absence of white tips to the wing-coverts:H. a. albocristatus – Guinea to west Ivory CoastH. a. macrourus – east Ivory Coast to Benin