The pied currawong (Strepera graculina) is a black passerine bird native to eastern Australia and Lord Howe Island. One of three currawong species in the genus Strepera, it is closely related to the butcherbirds and Australian magpie of the family Artamidae. Six subspecies are recognised. It is a robust crowlike bird averaging around in length, black or sooty grey-black in plumage with white undertail and wing patches, yellow irises, and a heavy bill. The male and female are similar in appearance. Known for its melodious calls, the species' name currawong is believed to be of indigenous origin.
Within its range, the pied currawong is generally sedentary, although populations at higher altitudes relocate to lower areas during the cooler months. It is omnivorous, with a diet that includes a wide variety of berries and seeds, invertebrates, bird eggs, juvenile birds and young marsupials. It is a predator which has adapted well to urbanisation and can be found in parks and gardens as well as rural woodland. The habitat includes every kind of forested area, although mature forests are preferred for breeding. Roosting, nesting and the bulk of foraging take place in trees, in contrast with the ground-foraging behaviour of its relative, the Australian magpie.
Taxonomy The pied currawong's binomial names were derived from the Latin strepera, meaning "noisy", and graculina for resembling a jackdaw. (Graculina isn't linked to actual jackdaws here but back in the days there was a conflation of jackdaws and grackles, the latter having been falsely considered to be part of the genus Gracula for a while) It was first described by English ornithologist George Shaw in John White's 1790 book, Journal of a Voyage to New South Wales, as the "white-vented crow", with Latin name Corvus graculinus. PGA BHL Also published in 1790, John Latham introduced the name Coracias strepera, classifying it with the rollers. The specific epithet strepera (or its masculine form, streperus) was used by several subsequent authors including Leach, Vieillot, Shaw, Temminck, and Gould, in genera Corvus (crows), Cracticus, Illustration by Paul Louis Oudart. Gracula (grackles), Barita, and Coronica.
René Lesson defined Strepera as a sub-genus of crows in 1831. John Gould described a second species, the black currawong of Tasmania, in 1836, and the next year created genus Coronica for both species. George Robert Gray adopted Lesson's name Strepera at the genus level and introduced the combination Strepera graculina in 1840.
Pied crow-shrike is an old vernacular name from colonial days, plate 42 et seq. and the term "pied" refers to two or more colours in blotches. Other common names include pied chillawong, currawang, charawack, kurrawack, tallawong, tullawong, mutton-bird, Otway forester, and pied afternoon-tea bird. The onomatopoeic term currawong itself is derived from the bird's call. However, the exact origin of the term is unclear; the most likely antecedent is the word garrawaŋ from the indigenous Jagera language from the Brisbane region, although the Darug word gurawaruŋ from the Sydney basin is a possibility. Yungang as well as Kurrawang and Kurrawah are names from the Tharawal people of the Illawarra region. French ornithologists such as Daudin, Lesson, and Vieillot called it the , meaning 'alarm clock' or 'wake-up caller'.
Its closest relative is the black currawong (S. fuliginosa) of Tasmania, which has sometimes been considered a subspecies. Together with the larger grey currawong (S. versicolor), they form the genus Strepera. Although crow-like in appearance and habits, currawongs are only distantly related to true crows, and instead belong to the family Artamidae, together with the closely related Australian magpie and the butcherbirds. The affinities of all three genera were recognised early on and they were placed in the family Cracticidae in 1914 by ornithologist John Albert Leach after he had studied their musculature. Ornithologists Charles Sibley and Jon Ahlquist recognised the close relationship between woodswallows and butcherbirds in 1985, and combined them into a Cracticini clade, which became the family Artamidae.
Subspecies Six subspecies are currently recognised, characterised principally by differences in size and plumage. There is a steady change to the birds' morphology and size the further south they are encountered, with lighter and more greyish plumage, larger body size, and a shorter bill. Southerly populations also show more white plumage in the tail, with less whiteness on the wing.
Strepera graculina graculina is the nominate form, found from the Sydney region north to the Burdekin River in northern Queensland. Strepera graculina ashbyi, (critically endangered), the western Victorian pied currawong, was described by Australian amateur ornithologist Gregory Mathews in 1913. It is threatened by hybridisation with the neighbouring subspecies nebulosa whose range is expanding westwards. A 2000 estimate placed the number of breeding birds at around 250. It resembles subspecies nebulosa, with sooty plumage, a long tail and a short bill. There is some doubt over whether ashbyi, which is little known, is a distinct subspecies or a colour morph of nebulosa. It is thought to have evolved after the two populations became separated by basalt plains in western Victoria, with the return of trees after the abandonment of regular Aboriginal burning in the late 18th century contributing to the remixing of populations. Hybrid forms have been identified in the Grampians and Yarra Valley. Further investigation in 2017 by Peter Menkhorst and Craig Morley established that the type specimen was an immature bird and that its collection point and characteristics placed it within subspecies nebulosa. They also observed there is a population that is abundant (rather than endangered) in the Otway Ranges that has a smaller speculum (wingpatch) than nebulosa and that Mathews had mistaken this for a subspecies of grey currawong, naming it Neostrepera versicolor riordani. They proposed renaming S. g. nebulosa to S. g. ashbyi and the other population as S. g. riordani. Strepera graculina crissalis, (vulnerable) the Lord Howe currawong was described by English naturalist Richard Bowdler Sharpe in 1877. It appears to have adapted well to human habitation on Lord Howe Island, though the population is small overall, somewhere around 70–80 birds. Although regarded as a subspecies, it has yet to be studied with molecular DNA techniques, which may lead to it being reclassified as a separate species.
Strepera graculina magnirostris is found on the Cape York Peninsula to the Normanby River in northern Queensland. First described by Henry Lake White in 1923, it has a longer and heavier bill and shorter tail than the nominate subspecies. It has been little studied to date. Strepera graculina robinsoni is found on the Atherton Tableland in northeastern Queensland. First described by Gregory Mathews in 1912, it is combined with magnirostris by some authors. Little researched, it appears to be smaller than other subspecies. Strepera graculina nebulosa, found in southeastern New South Wales, the Australian Capital Territory and central Victoria, is very similar to the nominate subspecies but has a shorter bill, longer tail and larger wing. Its upperparts are sooty black, a little paler than the nominate subspecies, and underparts sooty black to slate-grey. The white patch on the primary flight feathers is also smaller. It was first defined in 1999 by ornithologists and bird taxonomists Richard Schodde and Ian Mason. There is a hybrid zone with subspecies graculina in southern and central New South Wales, from Eden north to the Illawarra region and stretching northwest to the Blue Mountains.
Description
The pied currawong is generally a black bird with white in the wing, undertail coverts, the base of the tail and most visibly, the tip of the tail. It has yellow eyes. Adult birds are in length, with an average of around ; the wingspan varies from , averaging around . Adult males average around , females . The wings are long and broad. The long and heavy bill is about one and a half times as long as the head and is hooked at the end. Juvenile birds have similar markings to adults but have softer and brownish plumage overall, although the white band on the tail is narrower. The upperparts are darker brown with scallops and streaks over the head and neck, and the underparts lighter brown. The eyes are dark brown and the bill dark with a yellow tip. The gape is a prominent yellow. Older birds grow darker until adult plumage is achieved, but juvenile tail markings only change to adult late in development. Birds appear to moult once a year in late summer after breeding. The pied currawong can live for over 20 years in the wild.
Voice
Pied currawongs are vocal birds, calling when in flight and at all times of the day. They are noisier early in the morning and in the evening before roosting, as well as before rain. The loud distinctive call has been translated as Kadow-Kadang or Curra-wong, akin to a croak. They also have a loud, high-pitched, wolf-like whistle, transcribed as Wheeo. The endemic Lord Howe Island subspecies has a distinct, more melodious call.
Similar species The smaller white-winged chough has similar plumage but has red eyes and is found mainly on the ground. Australian crow and raven species have white eyes and lack the white rump, and the similar-sized Australian magpie has red eyes and prominent black and white plumage. The larger grey currawong is readily distinguished by its lighter grey overall plumage and lack of white feathers at the base of the tail. In northwestern Victoria, the black-winged currawong (subspecies melanoptera of the grey) does have a darker plumage than other grey subspecies, but its wings lack the white primaries of the pied currawong.
Distribution and habitat
The pied currawong is common in both wet and dry sclerophyll forests, rural and semi-urban environments throughout eastern Australia, from Cape York Peninsula to western Victoria and Lord Howe Island, where it occurs as an endemic subspecies. It has more recently become prevalent in South-East South Australia, in and around Mount Gambier. It has adapted well to European presence, and has become more common in many areas of eastern Australia, with surveys in Nanango, Queensland, Barham, New South Wales, Geelong, Victoria, as well as the Northern Tablelands and South West Slopes regions in New South Wales, all showing an increase in population. This increase has been most marked, however, in Sydney and Canberra since the 1940s and 1960s, respectively. In both cities, the species had previously been a winter resident only, but now remains year-round and breeds there. They are a dominant species and common inhabitant of Sydney gardens.
In general, the pied currawong is sedentary, although some populations from higher altitudes move to areas of lower elevation in winter. However, evidence for the extent of migration is conflicting, and the species' movements have been little studied to date. More recently still, a survey of the population of pied currawongs in southeastern Queensland between 1980 and 2000 had found the species had become more numerous there, including suburban Brisbane. One 1992 survey reported the total number of pied currawongs in Australia had doubled from three million birds in the 1960s to six million in the early 1990s.
The pied currawong is able to cross bodies of water of some size, as it has been recorded from Rodondo Island, which lies off the coast of Wilsons Promontory in Victoria, as well as some offshore islands in Queensland. It has disappeared from Tryon, North West, Masthead and Heron Islands in the Capricorn Group on the Great Barrier Reef. The presence of the Lord Howe subspecies is possibly the result of a chance landing there.