The northern cassowary (''Casuarius unappendiculatus'') also known as the one-wattled cassowary, single-wattled cassowary, or golden-necked cassowary, is a large, stocky flightless bird of northern

New Guinea New Guinea (; Hiri Motu Hiri Motu, also known as Police Motu, Pidgin Motu, or just Hiri, is a language of Papua New Guinea, which is spoken in surrounding areas of Port Moresby (Capital of Papua New Guinea). It is a simplified version of ...

. It is one of the three living species of

cassowary Cassowaries ( tpi, muruk, id, kasuari) are flightless birds of the genus ''Casuarius'' in the order Casuariiformes. They are classified as ratites (flightless birds without a keel on their sternum bones) and are native to the tropical forest ...

, alongside the

dwarf cassowary The dwarf cassowary (''Casuarius bennetti''), also known as Bennett's cassowary, little cassowary, mountain cassowary or muruk, is the smallest of the three species of cassowaries. Taxonomy The scientific name commemorates the Australian natura ...

and the

southern cassowary The southern cassowary (''Casuarius casuarius''), also known as double-wattled cassowary, Australian cassowary or two-wattled cassowary, is a large flightless black bird. It is one of the three living species of cassowary, alongside the dwarf c ...

. It is a member of the superorder

Paleognathae Palaeognathae (; ) is a infraclass of birds, called paleognaths, within the class Aves of the clade Archosauria. It is one of the two extant infraclasses of birds, the other being Neognathae, both of which form Neornithes. Palaeognathae contain ...

Taxonomy

Edward Blyth Edward Blyth (23 December 1810 – 27 December 1873) was an English zoologist who worked for most of his life in India as a curator of zoology at the museum of the Asiatic Society of India in Calcutta. Blyth was born in London in 1810. In 1841 ...

first identified the northern cassowary from a specimen from an

aviary An aviary is a large enclosure for confining birds, although bats may also be considered for display. Unlike birdcages, aviaries allow birds a larger living space where they can fly; hence, aviaries are also sometimes known as flight cages. Av ...

located in

Calcutta Kolkata (, or , ; also known as Calcutta , List of renamed places in India#West Bengal, the official name until 2001) is the Capital city, capital of the Indian States and union territories of India, state of West Bengal, on the eastern ba ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

, in 1860. It is the most recently discovered of all the cassowary species. The genus name ''Casuarius'' is derived from the

Malay Malay may refer to: Languages * Malay language or Bahasa Melayu, a major Austronesian language spoken in Indonesia, Malaysia, Brunei and Singapore ** History of the Malay language, the Malay language from the 4th to the 14th century ** Indonesi ...

word ''kesuari'' "cassowary", while the species name ''unappendiculatus'' refers to the species' single wattle. Officially, there are no

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

, though some authors list several subspecies.

Description

The northern cassowary has a hard and stiff black plumage, blue facial skin and a

casque Casque is a French word for helmet. It can refer to: * Casque (anatomy), an enlargement on the beaks of some species of birds, including many hornbills *Hornbill ivory, the casque of the helmeted hornbill, collected as a decorative material * S. C ...

on top of the head. It has a bright red or yellow coloured neck and wattle. The feet are huge and strong with long, dagger-like claw on its inner toe. The sexes are similar. The male, at , is smaller than the female, at an average of , making it the fourth heaviest living bird species after the

common ostrich The common ostrich (''Struthio camelus''), or simply ostrich, is a species of flightless bird native to certain large areas of Africa and is the largest living bird species. It is one of two extant species of ostriches, the only living members o ...

Somali ostrich The Somali ostrich (''Struthio molybdophanes''), also known as the blue-necked ostrich, is a large flightless bird native to the Horn of Africa. It is one of two living species of ostriches, the other being the common ostrich. It was also previo ...

and the

. These birds measure long and stand in height. Compared to the southern cassowary, the northern cassowary has a slightly shorter

bill Bill(s) may refer to: Common meanings * Banknote, paper cash (especially in the United States) * Bill (law), a proposed law put before a legislature * Invoice, commercial document issued by a seller to a buyer * Bill, a bird or animal's beak Plac ...

, at , but a slightly longer tarsal length, at .

Phylogeny

Casuariidae is the family of the northern cassowary. There are only four members, three of which are Cassowaries; the other, the only remaining species of emu. All are similar. Emus were classified in a different family until it was decided that they are similar enough to the cassowaries that they could be classified in the same family. All four members of the Casuariidae are large flightless birds. The northern cassowary and the emu share homologous features. For example, both have a blue patch of colour on their face/neck, but the functions of these differ. The emu's patch is of a paler colour and is used as a form of camouflage where it is located. The northern cassowary's patch of blue is brighter, and is used for attracting mates.

Range and habitat

The northern cassowary is distributed and

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to coastal swamp and lowland rainforests of northern

and the islands of

Yapen Yapen (also Japan, Jobi) is an island of Papua, Indonesia. The Yapen Strait separates Yapen and the Biak Islands to the north. It is in Cenderawasih Bay off the north-western coast of the island of New Guinea. To the west is Mios Num Island a ...

,Clements, J (2007)

Batanta Batanta is one of the four major islands in the Raja Ampat Islands in Southwest Papua province, Indonesia. Its area is 453 km² and its highest point is 1184 m. The Pitt Strait separates it from Salawati, while the Dampier Strait separate ...

and

Salawati Salawati is one of the four major islands in the Raja Ampat Islands in Southwest Papua (formerly West Papua), Indonesia. Its area is 1,623 km2. Salawati is separated from New Guinea to the southeast by the Sele Strait (a.k.a. Galowa Str ...

. They prefer elevations below .

Behaviour

As with other

cassowaries Cassowaries ( tpi, muruk, id, kasuari) are flightless birds of the genus ''Casuarius'' in the order Casuariiformes. They are classified as ratites (flightless birds without a keel (bird anatomy), keel on their sternum bones) and are native t ...

, the northern cassowary is a shy and solitary bird. Their diet consists mainly of berries, fruits and small animals, such as mice, rats, frogs, snakes, lizards, smaller birds and a variety of small insects and snails. They will eat dead animals when they find them. The young have been observed to eat the feces of the males raising them and clutch mates. Adults will eat their own feces as it often contains undigested fruits. They make grunting and hissing sounds, like other cassowaries.BirdLife International (2008)(a) In the breeding season, the polygamous female lays three to five green eggs on a well camouflaged nest prepared by the male; she then leaves the nest and eggs to find another mate. The male incubates the eggs and raises the chicks alone for about nine months.

Conservation

Although subject to ongoing habitat loss and overhunting in some areas, as of 2017 the northern cassowary is evaluated as

Least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

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 ...

of Threatened Species, as population size estimates suggest that populations are actually larger than previously estimated. However, it is the most threatened of the three extant cassowary types as of 2022. Hunting is still considered the biggest threat. Native people use the bones and eggs, and take the chicks to be raised for meat. As logging opens up more areas of the forest, hunting will be more of a problem. Their occurrence range is and a 2000 estimate placed their numbers at 9300.

References

Notes

Sources

* * * * * * *

External links

* * * * * {{Taxonbar, from=Q843182

northern cassowary The northern cassowary (''Casuarius unappendiculatus'') also known as the one-wattled cassowary, single-wattled cassowary, or golden-necked cassowary, is a large, stocky flightless bird of northern New Guinea. It is one of the three living spec ...

Birds of Papua New Guinea Birds of Indonesia