Owen's chameleon (Trioceros oweni), also commonly known as Owen's three-horned chameleon, is a species of lizard in the family Chamaeleonidae. The species is native to forests in central Africa. Named after British naval officer and explorer William Fitzwilliam Owen,^[3] it was first described in 1831 by the naturalist John Edward Gray, and is the type species of the genus Trioceros.^[2]

Quick Facts Conservation status, Scientific classification ...

Owen's chameleon
male
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Iguania
Family:	Chamaeleonidae
Genus:	Trioceros
Species:	T. oweni
Binomial name
Trioceros oweni (Gray, 1831)
A map illustrating the range of Owen's chameleon
Synonyms[2]
Chameleo oweni Gray, 1831 Chamaeleo tricornis A.M.C. Duméril & Bibron, 1836 Chamaeleo bibroni Martin, 1838 Chamaeleo grayii Swainson, 1839 Triceras owenii — Gray, 1865 Chamaeleo unicornis Mocquard, 1906 Chamaeleo michelli L. Müller, 1913 Chamaeleo (Trioceros) oweni — Klaver & Böhme, 1986 Trioceros oweni — Tilbury & Tolley, 2009

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Owen's chameleon can be found in much of tropical central Africa, from the Niger Delta in Nigeria in the north, to Angola in the south, and Burundi in the east.^[1] It inhabits dense evergreen and semi-deciduous forests at altitudes lower than 800 m (2,600 ft) above sea level, usually living in large trees.^[4] The type locality for the species is the island of Bioko in Equatorial Guinea.^[2]

Like many other chameleons, Owen's chameleon has a prehensile tail and a single claw on each toe. Males have three smooth horns,^[5] while females lack horns but have loose skin on their hind legs that gives the impression of wearing baggy trousers. On average, adult Owen's chameleons range from 25 to 28 cm (9.8 to 11.0 in) in total length (including tail),^[4] while a typical weight is around 75 g (2.6 oz).^[6] The species is generally arboreal and will leap from branch to branch or to the ground in order to avoid predators; it tends to feed on insects.^[1]

Because of its wide range, abundance, and population stability, Owen's chameleon is ranked Least Concern by the International Union for Conservation of Nature. However, there are concerns that logging and agricultural expansion may contribute to deforestation and potentially threaten the status of the species. In addition, it is occasionally exploited via the pet trade or traded locally to be used in traditional medicine; some tribes in the Democratic Republic of the Congo believe that scorched body of an Owen's chameleon can be used as a protective talisman, while around Yaounde in Cameroon the species is utilized as a treatment for maladies believed to be magical.^[1]