The rhinoceros hornbill (''Buceros rhinoceros'') is a large species of forest hornbill (

Bucerotidae Hornbills (Bucerotidae) are a family of bird found in tropical and subtropical Africa, Asia and Melanesia. They are characterized by a long, down-curved bill which is frequently brightly coloured and sometimes has a casque on the upper mandibl ...

). In captivity it can live for up to 35 years. It is found in lowland and montane, tropical and subtropical climates and in mountain

rain forest Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainforest ...

s up to 1,400 metres in

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...

, Sumatra,

Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mos ...

, the Malay Peninsula,

Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bor ...

, and southern

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...

. The rhinoceros hornbill is the state bird of the

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

n state of

Sarawak Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...

and the country's

national bird This is a list of national birds, including official birds of overseas territories and other states described as nations. Most species in the list are officially designated. Some species hold only an "unofficial" status. National birds See al ...

. Some

Dayak people The Dayak (; older spelling: Dajak) or Dyak or Dayuh are one of the native groups of Borneo. It is a loose term for over 200 riverine and hill-dwelling ethnic groups, located principally in the central and southern interior of Borneo, each w ...

, especially the Ibanic groups, believe it to be the chief of worldly birds or the supreme worldly bird, and its statue is used to welcome the god of the augural birds, Sengalang Burong, to the feasts and celebrations of humankind. Contrary to some misunderstandings, the rhinoceros hornbill does not represent their war god, who is represented in this world by the

brahminy kite The brahminy kite (''Haliastur indus''), formerly known as the red-backed sea-eagle in Australia, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors, such as eagles, buzzards, and harrie ...

. It is featured on the reverse of the 5

Malaysian ringgit The Malaysian ringgit (; plural: ringgit; symbol: RM; currency code: MYR; Malay name: ''Ringgit Malaysia''; formerly the Malaysian dollar) is the currency of Malaysia. It is divided into 100 ''sen'' (formerly ''cents''). The ringgit is issue ...

bill.

Taxonomy

The rhinoceros hornbill was formally described by the Swedish naturalist

Carl Linnaeus Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his Nobility#Ennoblement, ennoblement in 1761 as Carl von Linné#Blunt, Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalise ...

in 1758 in the tenth edition of his '' Systema Naturae''. He placed it with the

great hornbill The great hornbill (''Buceros bicornis''), also known as the concave-casqued hornbill, great Indian hornbill or great pied hornbill, is one of the larger members of the hornbill family. It occurs in the Indian subcontinent and Southeast Asia. It ...

in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

Buceros ''Buceros'' is a genus of large Asian hornbills (family Bucerotidae). Description Hornbills in the genus ''Buceros'' include some of the largest arboreal hornbills in the world, with the largest being the great hornbill. All the hornbills in th ...

'' and coined the binomial name ''Buceros rhinoceros''. Linnaeus specified the

location In geography, location or place are used to denote a region (point, line, or area) on Earth's surface or elsewhere. The term ''location'' generally implies a higher degree of certainty than ''place'', the latter often indicating an entity with an ...

as China. The genus name is from

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

''becerus'' meaning "horned like an ox" which in turn is from the

Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic p ...

boukerōs which combines ''bous'' meaning "ox" with ''kerōs'' meaning "horn". The specific ''rhinoceros'' is Latin for "rhinoceros". Three subspecies are recognised: * ''B. r. borneoensis''

Schlegel Schlegel is a German occupational surname. Notable people with the surname include: * Anthony Schlegel (born 1981), former American football linebacker * August Wilhelm Schlegel (1767–1845), German poet, older brother of Friedrich * Brad Schlege ...

& Müller, S, 1845 –

* ''B. r. rhinoceros'' Linnaeus, 1758 – south Malay Peninsula and Sumatra * ''B. r. silvestris''

Vieillot Louis Pierre Vieillot (10 May 1748, Yvetot – 24 August 1830, Sotteville-lès-Rouen) was a French ornithologist. Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collect ...

, 1816 –

Description

The rhinoceros hornbill is a large arboreal hornbill, long. The weight varies by sex, with males weighing around and the females . The plumage is predominantly black, with white legs and vent and a white tail with a black band. The huge bill and casque are orange and red, the colour coming from preen oil rubbed on from the preen gland above the tail. The eyes of the male are red with black rims, and white with red rims in the female.

Behaviour

Diet and feeding

Rhinoceros Hornbill nipping a peanut (24075109683)

The diet of the rhinoceros hornbill is dominated by fruit, but it will take any insect, small reptile, rodent, and smaller birds that it can catch.

Breeding

The courtship and bonding of these birds are critical, as the female must trust the male to provide her with everything when she is incubating and raising chicks. These hornbills make their nests inside tree trunks, and the female stays inside with the eggs and then with the chicks, while the male brings them food. After the eggs are laid, the male collects mud, and the pair pack that mud, along with food and feces, to wall up the entrance to the tree cavity. They leave a very small hole, just large enough for the male to feed the female, and later the chicks, and for the female to defecate through the hole. Once the chicks are fully feathered and old enough to leave the nest, the parents chip away the dry mud to let the chicks out.

Status and conservation

The rhinoceros hornbill faces a number of threats, including loss of its rainforest habitat, as well as hunting for its meat, and its skull and feathers. Habitat destruction has led to the loss of the large trees the species requires for breeding, which in turn makes it easier for poachers to find the rhinoceros hornbill. It is frequently shot at by poachers due to confusion with the highly sought-after

helmeted hornbill The helmeted hornbill (''Rhinoplax vigil'') is a very large bird in the hornbill family. It is found on the Malay Peninsula, Sumatra, Borneo, Thailand and Myanmar. The casque (helmetlike structure on the head) accounts for some 11% of its 3 ...

. Due to this, the species was uplisted to vulnerable from

near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify f ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

in 2018.

Gallery

Image: Rhinoceros_Hornbill.tif, Sepilok Nature Resort - Sabah, Borneo - Malaysia. Image: Rhinoceros_Hornbill_2.tif, Borneo Rainforest Lodge - Danum Valley, Sabah, Borneo - Malaysia. File:Rhinoceros_hornbill_national_aviary.jpg, Male at the

National Aviary The National Aviary, located in Pittsburgh, Pennsylvania, is the only independent indoor nonprofit aviary in the United States. It is also the country's largest aviary, and the only one accorded honorary "National" status by the United States Co ...

, Pittsburgh. Males have red irises. File:Buceros rhinoceros -Chester Zoo-8a.jpg, Female at

Chester Zoo Chester Zoo is a zoo at Upton-by-Chester, Cheshire, England. Chester Zoo was opened in 1931 by George Mottershead and his family. It is one of the UK's largest zoos at . The zoo has a total land holding of approximately . Chester Zoo is ope ...

, England File:Buceros_rhinoceros_silvestris_(Rhinoceros_Hornbill_-_Rhinozeros-Hornvogel)_-_Weltvogelpark_Walsrode_2012-01.jpg, ''Buceros rhinoceros silvestris'' at

Weltvogelpark Walsrode Weltvogelpark Walsrode, known as Walsrode Bird Park or Jubs in English until 2010, is a bird park located in the middle of the Lüneburg Heath in North Germany within the municipality of Bomlitz near Walsrode in the state of Lower Saxony, Germany ...

, Germany File:Rhinoceros hornbill at Birdworld 01.jpg, Female at

Birdworld Birdworld is the United Kingdom's largest bird park, covering . It is located in the East Hampshire district, close to the village of Bucks Horn Oak and the surrounding Alice Holt Forest. It is part of the parent company Haskins Garden Centre Lt ...

, England File:Sculpted Bill of Rhinoceros Hornbill (Buceros rhinoceros) (8443956987).jpg, Sculpted skull of rhinoceros hornbill at

Sarawak Museum The Sarawak State Museum ( ms, Muzium Negeri Sarawak) is the oldest museum in Borneo. It was founded in 1888 and opened in 1891 in a purpose-built building in Kuching, Sarawak. It has been said that naturalist Alfred Russel Wallace encouraged C ...

, Kuching,

References

External links

Downloadable audio file of the sounds of the rhinoceros hornbill

BBC Radio Programme concerning Hornbills, featuring a section focusing on the Rhinoceros Hornbill, including calls
{{Taxonbar, from=Q751036

rhinoceros hornbill The rhinoceros hornbill (''Buceros rhinoceros'') is a large species of forest hornbill (Bucerotidae). In captivity it can live for up to 35 years. It is found in lowland and montane, tropical and subtropical climates and in mountain rain forests ...

Birds of Malesia