The yellow-rumped thornbill (''Acanthiza chrysorrhoa'') is a species of

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped'), which includes more than half of all bird species. Sometimes known as perching birds, passerines are distinguished from other orders of birds by t ...

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

from the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

Acanthiza ''Acanthiza'' is a genus of passeriform birds, most endemic to Australia, but with two species (''A. murina'' and ''A. cinerea'') restricted to New Guinea. These birds are commonly known as thornbills. They are not closely related to species i ...

. The genus was once placed in the family Pardalotidae but that family was split and it is now in the family

Acanthizidae The Acanthizidae—known as Australian warblers—are a family of passerine birds which includes gerygones, the thornbills '' Acanthiza'', and the scrubwrens of '' Sericornis''. The Acanthizidae family consists of small to medium passerine birds, ...

. There are four subspecies of yellow-rumped thornbill. It is a small, brownish bird with a distinctive yellow rump and thin dark bill. It inhabits savannah, scrub and forests across most of Australia and eats insects. The species engages in cooperative breeding.

Taxonomy

The yellow-rumped thornbill was described as ''Saxicola chrysorrhoa'' by the French naturalists

Jean René Constant Quoy Jean René Constant Quoy (10 November 1790 in Maillé, Vendée, Maillé – 4 July 1869 in Rochefort, Charente-Maritime, Rochefort) was a French naval surgeon, zoologist and anatomist. In 1806, he began his medical studies at the school of naval ...

and

Joseph Paul Gaimard Joseph Paul Gaimard (31 January 1793 – 10 December 1858) was a French naval surgeon and naturalist. Biography Gaimard was born at Saint-Zacharie on January 31, 1793. He studied medicine at the naval medical school in Toulon, subsequent ...

in 1830, from a specimen collected in

King George Sound King George Sound ( nys , Menang Koort) is a sound on the south coast of Western Australia. Named King George the Third's Sound in 1791, it was referred to as King George's Sound from 1805. The name "King George Sound" gradually came into use ...

.Quoy, J.R.C. & Gaimard, J.P. in Dumont-d'Urville, J. (1830). ''Voyage de découvertes de l'Astrolabe exécuté par ordre du Roi, pendant les anneés 1826-1827-1828-1829, sous le commandement de M.J. Dumont-d'Urville''. ''Zoologie''. Paris: J. Tastu Vol. 1 i p197 The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

derives from

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 peri ...

''khrysos'' 'gold' and ''orrhos'' 'rump'. Four subspecies are recognised: the nominate ''chrysorrhoa'' of Western Australia, ''leachi'' of Tasmania, ''leighi'' of eastern Australia, and ''normantoni'' of central and northern Australia. ''Butterbum'' is a colloquial name used by Australian birdwatchers. A 2017 genetic study using both mitochondrial and nuclear DNA found the yellow-rumped thornbill was an early offshoot within the thornbill genus, its ancestor diverging from that of all other thornbills just over 10 million years ago.

Description

The yellow-rumped thornbill is the largest species of thornbill, long and weighing .del Hoyo, J.; Elliot, A. & Christie D. (editors). (2007). ''Handbook of the Birds of the World'', ''Volume 12: Picathartes to Tits and Chickadees.'' Lynx Edicions. P. 608, It has a short tail and a long slender bill. The species has a distinctive yellow rump, a black forehead with white spots, grey head and neck, a white line above the eye and white throat. The belly is white with light buff below the wings. The wings are grey and the tail is black. The

plumage Plumage ( "feather") is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, ...

varies somewhat, depending on subspecies.

Voice

The yellow-rumped thornbill has a distinctive song described as "twittering, musical, sweet, high-pitched". The species is also reported to be an accomplished mimic of other birds, in particular mimicking the alarm calls of the

noisy miner The noisy miner (''Manorina melanocephala'') is a bird in the honeyeater family, Meliphagidae, and is endemic to eastern and southeastern Australia. This miner is a grey bird, with a black head, orange-yellow beak and feet, a distinctive yellow ...

Distribution and habitat

The species has a wide distribution across western, southern and eastern

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

as well as

Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...

; it is absent from the north coast of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

, parts of central Australia, northern Queensland and central and northern

Northern Territory The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory ...

. The species inhabits a wide range of habitats, including open forest and woodland, grasslands, savannah and scrubland.

Feeding

The yellow-rumped thornbill is insectivorous; major prey items include ants, beetles, bugs and lerps. Other items eaten include spiders, flies and seeds. The species usually forages in small groups of between 3-12 individuals, and may join mixed species-flocks with other small insectivorous passerines such as the

speckled warbler The speckled warbler (''Pyrrholaemus sagittatus'') is a species of bird in the family Acanthizidae. It is endemic to eastern Australia. Its natural habitat is temperate forests. Taxonomy The speckled warbler was first described by English physi ...

(''Chthonicola sagittatus''),

weebill The weebill (''Smicrornis brevirostris'') is a species of bird in the family Acanthizidae. It is an insectivorous passerine that is found throughout mainland Australia. At long, it is Australia's smallest bird. It was originally described by Joh ...

(''Smicrornis brevirostris''), and other species of thornbill.

Breeding

Breeding takes place from July to December, with one, two or even more broods a year. Nesting usually occurs as a pair, but sometimes one to three helpers will assist the breeding pair. The nest is a messy dome-shaped structure made of dried grass and other vegetation hidden low down among dense foliage or shrubs, or sometimes in vines or mistletoe. Atop the dome is a cup-shaped depression which serves as a false nest, while the real nest is inside with a concealed entrance. A clutch of three or four dull-white oval eggs, lightly spotted with red-brown mostly at the large end and each measuring , is laid.Pizzey, Graham; Doyle, Roy (1980) ''A Field Guide to the Birds of Australia''. Collins Publishers, Sydney. The female incubates the clutch, and the clutch takes around 16–18 days to hatch. On hatching both parents help feed the brood. The nestling period is around 19 days. The species is parasitised by the

shining bronze-cuckoo The shining bronze cuckoo (''Chrysococcyx lucidus'') is a species of cuckoo in the family Cuculidae, found in Australia, Indonesia, New Caledonia, New Zealand, Papua New Guinea, Solomon Islands, and Vanuatu. It was previously also known as ''Chal ...

and the

fan-tailed cuckoo The fan-tailed cuckoo (''Cacomantis flabelliformis'') is a species of cuckoo in the family Cuculidae. It is found in Australia, Fiji, New Caledonia, New Zealand, New Guinea, Solomon Islands, and Vanuatu. Taxonomy Six subspecies have been reco ...

. Many species of bird take eggs and chicks from the nest, including

red wattlebird The red wattlebird (''Anthochaera carunculata'') is a passerine bird native to southern Australia. At in length, it is the second largest species of Australian honeyeater. It has mainly grey-brown plumage, with red eyes, distinctive pinkish-re ...

currawong Currawongs are three species of medium-sized passerine birds belonging to the genus ''Strepera'' in the family Artamidae native to Australia. These are the grey currawong (''Strepera versicolor''), pied currawong (''S. graculina''), and black cu ...

Australian magpie The Australian magpie (''Gymnorhina tibicen'') is a black and white passerine bird native to Australia and southern New Guinea. Although once considered to be three separate species, it is now considered to be one, with nine recognised subs ...

s and

raven A raven is any of several larger-bodied bird species of the genus ''Corvus''. These species do not form a single taxonomic group within the genus. There is no consistent distinction between "crows" and "ravens", common names which are assigned t ...

s, and many

honeyeater The honeyeaters are a large and diverse family (biology), family, Meliphagidae, of small to medium-sized birds. The family includes the Epthianura, Australian chats, myzomelas, friarbirds, wattlebirds, Manorina, miners and melidectes. They are ...

s will destroy their nests in order to steal nesting material.

Ringing Ringing may mean: Vibrations * Ringing (signal), unwanted oscillation of a signal, leading to ringing artifacts * Vibration of a harmonic oscillator ** Bell ringing * Ringing (telephony), the sound of a telephone bell * Ringing (medicine), a ri ...

studies have found that the species can live for up to nine years.

References

{{Taxonbar, from=Q1300214

yellow-rumped thornbill The yellow-rumped thornbill (''Acanthiza chrysorrhoa'') is a species of passerine bird from the genus Acanthiza. The genus was once placed in the family Pardalotidae but that family was split and it is now in the family Acanthizidae. There are f ...

Endemic birds of Australia

Taxa named by Jean René Constant Quoy Taxa named by Joseph Paul Gaimard Articles containing video clips