Currawong

This article is about the bird genus. For the Sydney suburb and beach, see Currawong Beach, New South Wales. For the Melbourne park, see Currawong Bush Park.
Currawong
Black currawong, Fortescue Bay, Tasman Peninsula
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Artamidae
Genus: Strepera
Species
  • Strepera graculina
  • Strepera versicolor
  • Strepera fuliginosa

Currawongs are three species of medium-sized passerine birds belonging to the genus Strepera in the family Artamidae native to Australasia. These are the grey currawong (Strepera versicolor), pied currawong (S. graculina), and black currawong (S. fuliginosa). The common name comes from the call of the familiar pied currawong of eastern Australia and is onomatopoeic. They were formerly known as crow-shrikes or bell-magpies. Despite their resemblance to crows and ravens, they are only distantly related to the corvidae, instead belonging to an Afro-Asian radiation of birds of superfamily Malaconotoidea.

The true currawongs are a little larger than the Australian magpie, smaller than the ravens (except possibly the little raven, which is only slightly larger on average), but broadly similar in appearance. They are easily distinguished by their yellow eyes, in contrast to the red eyes of a magpie and white eyes of Australian crows and ravens. Currawongs are also characterised by the hooked tips of their long, sharply pointed beaks.[1] They are not as terrestrial as the magpie and have shorter legs. They are omnivorous, foraging in foliage, on tree trunks and limbs, and on the ground, taking insects and larvae (often dug out from under the bark of trees), fruit, and the nestlings of other birds. They are distinguishable from magpies and crows by their comical flight style in amongst foliage, appearing to almost fall about from branch to branch as if they were inept flyers.

Taxonomy and evolution

Ornithologist Richard Bowdler Sharpe held that currawongs were more closely related to crows and ravens than the Australian magpie and butcherbirds, and duly placed them in the Corvidae.[2] A review of the family Cracticidae by ornithologist John Albert Leach in 1914, during which he had studied their musculature, found that all three genera were closely related.[3] Ornithologists Charles Sibley and Jon Ahlquist recognised the close relationship between the woodswallows and the butcherbirds and relatives in 1985, and combined them into a Cracticini clade,[4] which later became the family Artamidae in the official Australian checklist in 2008.[5] The International Ornithologists’ Union has maintained the two clades as separate families, hence currawongs are listed along with butcherbirds, magpie and Peltops.[6]

The family Cracticidae has its greatest diversity in Australia, which suggests that the radiation of its insectivorous and scavenger members to occupy various niches took place there. The butcherbirds became predators of small animals, much like the northern hemisphere shrikes, while the Australian magpie became a predominantly ground-hunting omnivore, with the currawongs generally hunting in both living and fallen trees, scavenging and hunting insects and small vertebrates, and occupying in Australia the niche of many Eurasian corvids.[7]

Currawongs and indeed all members of the broader Artamidae are part of a larger group of African shrike-like birds including bushshrikes (Malaconotidae), helmetshrikes (Prionopidae), ioras (Aegithinidae), and vangas (Vangidae), which were defined as the superfamily Malaconotoidea by Cacraft and colleagues in 2004.[8] They are thus only distantly related to crows and ravens, which are in a separate superfamily Corvoidea.[9]

Species and races

Although there are several distinct forms, the number of species has varied between two and seven, with three currently recognised. (In 1870 the Gardens of the Zoological Society of London had a living specimen of each of the three species.[10]) Several subspecies of the grey currawong are fairly distinctive and described on that species page.

Etymology

The term currawong itself is derived from the call of the pied currawong.[11] However, the exact origin of term is unclear; the most likely antecedent is the word garrawaŋ from the indigenous Jagera language from the Brisbane region, although the Dharug word gurawaruŋ from the Sydney basin is a possibility.[12] Yungang as well as kurrawang and kurrawah are names from the Tharawal people of the Illawarra region.[13]

Description

The three currawong species are sombre-plumaged dark grey or black birds with large bills. They resemble crows and ravens, although are slimmer in build with longer tails, booted tarsi[7] and white pages on their wings and tails.[14] Their flight is undulating. Male birds have longer bills than females, the reason for which is unknown but suggests differentiation in feeding technique.[7]

Distribution and habitat

Currawongs are protected in NSW under the National Parks and Wildlife Act 1974.

Behaviour

Currawongs are dominant birds that can drive off other species, especially when settling around an area used or inhabited by people.[14] They have been known to migrate to towns and cities during the winter.[15] Birds congregate in loose flocks.[14]

The female builds the nest and incubates the young alone, although both parents feed them. The nests are somewhat flimsy for birds their size.[7]

References

  1. ↑ Amazing Facts about Australian Birds, by Karin Cox and Steve Parish, Steve Parish Publishing, 2008.
  2. ↑ Sharpe, Richard Bowdler (1877). Catalogue of the Passeriformes, or Perching Birds, in the Collection of the British Museum. Coliomorphae containing the families Corvidae, Paradisaeidae, Oriolidae, Dicruridae, and Prionopidae. London: by Order of the Trustees. pp. 57–61. Retrieved 15 May 2010.
  3. ↑ Leach, John Albert (1914). "The myology of the Bell-Magpie (Strepera) and its position in classification". Emu. 14 (1): 2–38. doi:10.1071/MU914002.
  4. ↑ Sibley, Charles G.; Ahlquist, Jon E. (1985). "The phylogeny and classification of Australo-Papuan passerine birds" (PDF). Emu. 85 (1): 1–14. doi:10.1071/MU9850001.
  5. ↑ Christidis, Les; Boles, Walter E. (2008). Systematics and Taxonomy of Australian Birds. Canberra: CSIRO Publishing. p. 196. ISBN 978-0-643-06511-6.
  6. ↑ Gill, Frank; Donsker, David (Eds). (2012). "Batises to shrikes". IOC World Bird Names (v 3.2). International Ornithologists’ Union. Retrieved 13 January 2013.
  7. 1 2 3 4 Schodde, Richard; Mason, Ian J. (1999). The Directory of Australian Birds: Passerines. A Taxonomic and Zoogeographic Atlas of the Biodiversity of Birds in Australia and its Territories. Collingwood, Australia: CSIRO Publishing. p. 532.
  8. ↑ Cracraft, Joel, Barker F. Keith, Braun, Michael, Harshman, John, Dyke, Gareth J., Feinstein, Julie, Stanley, Scott, Cibois, Alice, Schikler, Peter, Beresford, Pamela, García-Moreno, Jaime, Sorenson, Michael D., Yuri, Tamaki, Mindell, David P. (2004). "Phylogenetic relationships among modern birds (Neornithes): toward an avian tree of life". In Cracraft J, Donoghue MJ. Assembling the tree of life. New York, New York: Oxford University Press. pp. 468–89. ISBN 0-19-517234-5.
  9. ↑ Christidis, Les; Boles, Walter E. (2008). Systematics and Taxonomy of Australian Birds. Canberra: CSIRO Publishing. p. 172. ISBN 978-0-643-06511-6.
  10. ↑ "Sooty Crow-shrike". Proceedings of the Zoological Society of London: 270. 12 May 1870.
  11. ↑ Higgins, Peter Jeffrey; Peter, John M.; Cowling SJ (eds.) (2006). Handbook of Australian, New Zealand and Antarctic Birds. Vol. 7: Boatbill to Starlings. Melbourne: Oxford University Press. p. 530. ISBN 978-0-19-553996-7.
  12. ↑ Dixon, Robert Malcolm Ward (1992). Australian Aboriginal Words in English. Oxford University Press. p. 90. ISBN 0-19-553394-1.
  13. ↑ Wesson, Sue (August 2005). "Murni Dhugang Jirrar: Living in the Illawarra" (PDF). Department of Environment, Climate Change, and Water. Department of Environment, Climate Change, and Water, State Government of New South Wales. p. 81. Retrieved 22 February 2010.
  14. 1 2 3 Wade Peter (ed.) (1977). Every Australian Bird Illustrated. Adelaide, South Australia: Rigby. p. 292. ISBN 0-7270-0009-8.
  15. ↑ Slater, Peter (1974). A Field Guide to Australian Birds:Non-passerines. Adelaide, South Australia: Rigby. p. 277. ISBN 0-85179-813-6.
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