The hoatzin (/hoʊˈætsɪn/hoh-AT-sin)[note 1] or hoactzin (/hoʊˈæktsɪn/hoh-AKT-sin) (Opisthocomus hoazin)[4] is a species of tropical bird found in swamps, riparian forests, and mangroves of the Amazon and the Orinoco basins in South America. It is the only extant species in the genus Opisthocomus[5] which is the only extant genus in the Opisthocomidae family under the order of Opisthocomiformes.[6] Despite being the subject of intense debate by specialists, the taxonomic position of this family is still far from clear.
The hoatzin is notable for its chicks having primitive claws on two of their wing digits; the species also is unique in possessing a digestive system capable of fermentation and the effective breaking-down of plant matter, a trait more commonly known from herbivorous ungulate-ruminant mammals and some primates. This bird is also the national bird of Guyana, where the local name for this bird is the Canje pheasant.
^BirdLife International (2016). "Opisthocomus hoazin". IUCN Red List of Threatened Species. 2016: e.T22684428A93028795. doi:10.2305/IUCN.UK.2016-3.RLTS.T22684428A93028795.en. Retrieved 12 November 2021.
^"Definition of hoatzin". Dictionary.com. Retrieved 14 February 2022.
^"HOATZIN English Definition and Meaning". Lexico Dictionaries. Lexico. Archived from the original on February 14, 2022. Retrieved 2022-02-14.
^"hoatzin". The Chambers Dictionary (9th ed.). Chambers. 2003. ISBN 0-550-10105-5.
^Cite error: The named reference HBW was invoked but never defined (see the help page).
^Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2023). "Hoatzin, New World vultures, Secretarybird, raptors". IOC World Bird List Version 13.1. International Ornithologists' Union. Retrieved 12 March 2023.
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The hoatzin (/hoʊˈætsɪn/ hoh-AT-sin) or hoactzin (/hoʊˈæktsɪn/ hoh-AKT-sin) (Opisthocomus hoazin) is a species of tropical bird found in swamps, riparian...
within the order Opisthocomiformes. The only living representative is the hoatzin (Opisthocomus hoazin) which lives in the Amazon and the Orinoco delta in...
Protoazin is an extinct genus of early hoatzin from late Eocene (about 36 mya) deposits of France. Gerald Mayr and Vanesa L. De Pietri (2014). "Earliest...
Mirandornithes (flamingos and grebes) The three orphaned orders: Opisthocomiformes (hoatzin) Gruiformes (cranes and rails) Charadriiformes (shorebirds, gulls and alcids)...
Chlorestes notata Order: Opisthocomiformes Family: Opisthocomidae The Hoatzin is pheasant-sized, but much slimmer. It has a long tail and neck, but a...
slow to digest, and contain little energy relative to other foods. The hoatzin is an example of a flighted, folivorous bird. There are, however, many...
(39 in), with a wingspan of 2.1 m (83 in) and a weight of 8 kg (17.6 lb). Hoatzin (Opisthocomus hoazin), the only member of its order, is a pheasant-sized...
has evolved independently in several groups of mammals, and also in the hoatzin, a species of bird. Foregut fermentation is employed by ruminants and pseudoruminants...
the Cuculiformes, which also includes the roadrunners, the anis, and the hoatzin. It is a medium-sized member of its genus and is found in lightly-wooded...
Chlorestes notata (E-SA) Order: Opisthocomiformes Family: Opisthocomidae The hoatzin is pheasant-sized, but much slimmer. It has a long tail and neck, but a...
Hoazinavis is an extinct genus of early hoatzin from Late Oligocene and Early Miocene (about 24–22 mya) deposits of Brazil. It was collected in 2008 from...
Chlorestes cyanus Order: Opisthocomiformes Family: Opisthocomidae The hoatzin is pheasant-sized, but much slimmer. It has a long tail and neck, but a...
features. Some birds, such as ducks, swans, Jacanas (Jacana sp.), and the hoatzin (Opisthocomus hoazin), have them concealed beneath their leg-feathers....
Amethyst woodstar Order: Opisthocomiformes Family: Opisthocomidae The hoatzin is pheasant-sized, but much slimmer. It has a long tail and neck, but a...
ISBN 978-0-521-59835-4. Davies, S.J.J.F. (2003). "Birds I: Tinamous and Ratites to Hoatzins". In Hutchins, Michael (ed.). Grzimek's Animal Life Encyclopedia. Vol. 8...
Grzimek's Animal Life Encyclopedia, Vol. 8: Birds I Tinamous and Ratites to Hoatzins (2nd ed.). Farmington Hills, MI: Gale Group. pp. 103–104. ISBN 978-0-7876-5784-0...
group to a full order Musophagiformes. They have been proposed to link the hoatzin to the other living birds, but this was later disputed. Recent genetic...
"Ostriches". In Hutchins, Michael (ed.). Birds I Tinamous and Ratites to Hoatzins. Grzimek's Animal Life Encyclopedia. Vol. 8 (2nd ed.). Farmington Hills...
Sargatal, J. (editors). (1996) Handbook of the Birds of the World. Volume 3: Hoatzin to Auks. Lynx Edicions. ISBN 84-87334-20-2 New Shorter Oxford English Dictionary...
Namibiavis is an extinct genus of early hoatzin from early Middle Miocene (about 16 mya) deposits of Namibia. It was collected from Arrisdrift, southern...
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (December 2023). "Hoatzin, New World vultures, Secretarybird, raptors". IOC World Bird List Version...
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