Northern cassowary

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Northern cassowary
Casuarius unappendiculatus -Northern Cassowary -head to toe.jpg
At Bali Bird Park
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Infraclass: Palaeognathae
Order: Casuariiformes
Family: Casuariidae
Genus: Casuarius
Species:
C. unappendiculatus
Binomial name
Casuarius unappendiculatus
Blyth, 1860 [2]
Casuarius unappendiculatus distribution map.png
Distribution of the northern cassowary
Synonyms [3]
  • Casuarius doggettiRothschild 1904
  • Casuarius unappendiculatus doggetti(Rothschild 1904)
  • Casuarius unappendiculatus hagenbecki(Rothschild 1904)
  • Casuarius unappendiculatus jamrachi(Rothschild 1904)
  • Casuarius unappendiculatus mitratusRothschild 1904
  • Casuarius unappendiculatus multicolorLe Souef 1930
  • Casuarius unappendiculatus suffususRothschild 1904
  • Casuarius rothschildiMatschie 1901
  • Casuarius unappendiculatus rothschildi(Matschie 1901)
  • Casuarius philipiRothschild 1898
  • Casuarius unappendiculatus philipi(Rothschild 1898)
  • Casuarius unappendiculatus unappendiculatus(Blyth 1860)
  • Casuarius occipitalisSalvadori 1878
  • Casuarius unappendiculatus occipitalis(Salvadori 1878)
  • Casuarius unappendiculatus rufotinctusRothschild 1900
  • Casuarius unappendiculatus aurentiacusRothschild 1899
  • Casuarius kaupiRosenberg 1861
  • Casuarius laglaizeiOustalet 1893

The northern cassowary (Casuarius unappendiculatus), also known as the one-wattled cassowary, single-wattled cassowary, [2] or golden-necked cassowary, is a large, stocky flightless bird of northern New Guinea. It is one of the three living species of cassowary, alongside the dwarf cassowary and the southern cassowary. It is a member of the superorder Paleognathae.

Contents

Taxonomy

Edward Blyth first identified the northern cassowary from a specimen from an aviary located in Calcutta, India, in 1860. [2] It is the most recently discovered of all the cassowary species. [4] The genus name Casuarius is derived from the Malay word kesuari "cassowary", while the species name unappendiculatus refers to the species' single wattle. [5] Officially, there are no subspecies, though some authors list several subspecies. [6] [7]

Description

At Walsrode Bird Park Casuarius unappendiculatus qtl1.jpg
At Walsrode Bird Park

The northern cassowary has a hard and stiff black plumage, blue facial skin and a casque 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 in appearance. The male, at 30 to 37 kg (66 to 82 lb), is smaller than the female, at an average of 58 kg (128 lb), making it the fourth heaviest living bird species after the common ostrich, Somali ostrich and the southern cassowary. [2] These birds measure 149 cm (4 ft 10+12 in) long and stand 1.5–1.8 m (4 ft 11 in – 5 ft 11 in) in height. [2] Compared to the southern cassowary, the northern cassowary has a slightly shorter bill, at 12 to 13.7 cm (4.7 to 5.4 in), but a slightly longer tarsal length, at 28 to 33.2 cm (11.0 to 13.1 in). [2]

Phylogeny

Northern cassowaries are members of the family Casuariidae, of which there are only four extant members. Three of being the Cassowaries; the other the last remaining extant species of emu. All present superficial similarities, along being 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.[ citation needed ]

An alternate classification was proposed in 2014 by Mitchell et al., based on analysis of mitochondrial DNA. This splits off the Casuariidae into their own order, the Casuariformes, and includes only the cassowaries in the family Casuariidae, placing the emus in their own family, Dromaiidae.

Range and habitat

The northern cassowary is distributed and endemic to coastal swamp and lowland rainforests of northern New Guinea and the islands of Yapen, [8] Batanta and Salawati. [9] They prefer elevations below 490 m (1,610 ft). [2]

Breeding population and trends [9]
LocationPopulationTrend
Northern Papua New Guinea UnknownDeclining
Yapen UnknownDeclining
Batanta UnknownDeclining
Salawati UnknownDeclining
Waigeo UnknownDeclining
Total2,500 to 10,000Declining

Behaviour

Egg, Collection Museum Wiesbaden Casuarius unappendiculatus MWNH 0014.JPG
Egg, Collection Museum Wiesbaden

As with other cassowaries, the northern cassowary is a shy and solitary bird. Their diet consists mainly of berries, [10] fruits [2] 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. [10] They make grunting and hissing sounds, like other cassowaries. [9]

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 on the IUCN Red List 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. [4] Hunting is still considered the biggest threat. [9] 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. [1] [2] Their occurrence range is 186,000 km2 (72,000 sq mi) and a 2000 estimate placed their numbers at 9300. [9]

Related Research Articles

<span class="mw-page-title-main">Cassowary</span> Genus of flightless birds

Cassowaries 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. Cassowaries are native to the tropical forests of New Guinea, the Aru Islands (Maluku), and northeastern Australia.

<span class="mw-page-title-main">Ratite</span> Polyphyletic group of birds

A ratite is any of a group of mostly flightless birds within the infraclass Palaeognathae. They are mostly large, long-necked, and long-legged, the exception being the kiwi, which is also the only nocturnal extant ratite.

<span class="mw-page-title-main">Casuariidae</span> Family of birds

The bird family Casuariidae has four surviving members: the three species of cassowary and the emu.

<span class="mw-page-title-main">Little tinamou</span> Species of bird

The little tinamou is a species of tinamou. It is found in Central and South America, as well as on the Caribbean island of Trinidad.

<span class="mw-page-title-main">Southern cassowary</span> Species of bird

The southern cassowary, also known as double-wattled cassowary, Australian cassowary, or two-wattled cassowary, is a large flightless black bird, found in Indonesia, Papua New Guinea, and northeastern Australia. It is one of the three living species of cassowary, alongside the dwarf cassowary and the northern cassowary. It is a ratite and therefore related to the emu, ostriches, rheas and kiwi.

<span class="mw-page-title-main">White-throated tinamou</span> Species of bird

The white-throated tinamou is a species of bird native to the Amazon rainforest of Brazil, northern Bolivia, southeastern Colombia, northeastern Ecuador, eastern Peru and southern Venezuela.

<span class="mw-page-title-main">Brown tinamou</span> Species of bird

The brown tinamou is a brownish ground bird found in humid lowland and montane forest in tropical and subtropical South America.

<span class="mw-page-title-main">Great spotted kiwi</span> Species of flightless bird in New Zealand

The great spotted kiwi, great grey kiwi or roroa is a species of kiwi endemic to the South Island of New Zealand. The great spotted kiwi, as a member of the ratites, is flightless. It is the largest of the kiwi. The rugged topography and harsh climate of the high altitude alpine part of its habitat render it inhospitable to a number of introduced mammalian predators, which include dogs, ferrets, cats, and stoats. Because of this, populations of this species have been less seriously affected by the predations of these invasive species compared to other kiwi. Nonetheless, there has been a 43% decline in population in the past 45 years, due to these predators and habitat destruction. This has led it to be classified as vulnerable. There are less than 16,000 great spotted kiwis in total, almost all in the more mountainous parts of northwest Nelson, the northwest coast, and the Southern Alps. A minority live on island reserves.

<span class="mw-page-title-main">Casuariiformes</span> Order of birds

The Casuariiformes is an order of large flightless birds that has four surviving members: the three species of cassowary, and the only remaining species of emu. They are divided into either a single family, Casuariidae, or more typically two, with the emu splitting off into its own family, Dromaiidae.

<span class="mw-page-title-main">Dwarf cassowary</span> Species of bird

The dwarf cassowary, also known as Bennett's cassowary, little cassowary, mountain cassowary or muruk, is the smallest of the three extant species of cassowaries.

<span class="mw-page-title-main">Palaeognathae</span> Infraclass of birds

Palaeognathae is an infraclass of birds, called paleognaths or palaeognaths, 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 contains five extant branches of flightless lineages, termed ratites, and one flying lineage, the Neotropic tinamous. There are 47 species of tinamous, five of kiwis (Apteryx), three of cassowaries (Casuarius), one of emus (Dromaius), two of rheas (Rhea) and two of ostriches (Struthio). Recent research has indicated that paleognaths are monophyletic but the traditional taxonomic split between flightless and flighted forms is incorrect; tinamous are within the ratite radiation, meaning flightlessness arose independently multiple times via parallel evolution.

<span class="mw-page-title-main">Red-legged tinamou</span> Species of bird

The red-legged tinamou or red-footed tinamou, is a ground-dwelling bird found in the tropics and lower subtropics of northern South America.

<span class="mw-page-title-main">Tepui tinamou</span> Species of bird

The tepui tinamou is a type of ground bird found in montane moist forest on tepuis, in southeastern Venezuela.

<span class="mw-page-title-main">Brazilian tinamou</span> Species of bird

The Brazilian tinamou is a type of tinamou found in tropical moist lowland forest in regions of Amazonian South America.

<span class="mw-page-title-main">Black-capped tinamou</span> Species of bird

The black-capped tinamou is a type of tinamou commonly found in the moist forest lowlands in subtropical and tropical regions.

<span class="mw-page-title-main">Barred tinamou</span> Species of bird

The barred tinamou is a type of tinamou commonly found in lowland moist forest in subtropical and tropical regions of northern South America.

<span class="mw-page-title-main">Taczanowski's tinamou</span> Species of bird

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<span class="mw-page-title-main">Curve-billed tinamou</span> Species of bird

The curve-billed tinamou is a type of tinamou commonly found in high-altitude grassland and shrubland habitats in the Andes of South America.

<span class="mw-page-title-main">Quebracho crested tinamou</span> Species of bird

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<span class="mw-page-title-main">Tallest extant birds</span>

This is a list of the tallest extant birds according to maximum height. Birds range from a tiny bee hummingbird, which is only 5–6 cm (2.0–2.4 in), to the giant African ostrich, almost 280 cm (9.2 ft) in height.

References

Notes

  1. 1 2 BirdLife International (2017). "Casuarius unappendiculatus". IUCN Red List of Threatened Species . 2017: e.T22678114A118134784. doi: 10.2305/IUCN.UK.2017-3.RLTS.T22678114A118134784.en . Retrieved 19 November 2021.
  2. 1 2 3 4 5 6 7 8 9 Davies, S. J. J. F. (2003)
  3. Peron, Richard. "Taxonomy of the Genus Casuarius". Archived from the original on 5 March 2016.
  4. 1 2 "Cassowary". San Diego Zoo Wildlife Alliance. 2022. Retrieved 18 September 2022.
  5. Gotch, A. F. (1995)
  6. Avibase
  7. Brands, S. (2008)
  8. Clements, J (2007)
  9. 1 2 3 4 5 BirdLife International (2008)(a)
  10. 1 2 "Casuarius unappendiculatus (Northern cassowary)". Animal Diversity Web .

Sources