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Butcherbirds are magpie-like birds in the genus ''Cracticus.'' They are native to Australasia. The Australian magpie has recently been placed in the same genus,〔Christidis, L., Boles, W., 2008. Systematics and Taxonomy of Australian birds, Collingwood, Victoria, Australia. CSIRO Publishing.〕 and this new taxonomy has been supported by recent phylogenetic analyses.〔Kearns, A.M., Joseph, L. and Cook, L.G. 2013. A multilocus coalescent analysis of the speciational history of the Australo-Papuan butcherbirds and their allies. Mol. Phyl. Evol. 66: 941–952. doi: 10.1016/j.ympev.2012.11.020〕 Together with three species of currawong and two species of peltops, butcherbirds and the Australian magpie form the subfamily Cracticinae in the family Artamidae. Butcherbirds are large songbirds, being between in length. Their colour ranges from black-and-white to mostly black with added grey plumage, depending on the species. They have a large, straight bill with a distinctive hook at the end which is used to skewer prey. They have high-pitched complex songs, which are used to defend their essentially year-round group territories: unlike birds of extratropical Eurasia and the Americas, both sexes sing prolifically.〔Johnson Gayle; “Vocalizations in the Grey Butcherbird ''Cracticus torquatus'' with Emphasis on Structure in Male Breeding Song: Implications for the Function and Evolution of Song from a Study of a Southern Hemisphere Species”; PhD Doctorate; Griffith University, 2003〕 Butcherbirds are insect eaters for the most part, but will also feed on small lizards and other vertebrates. They get their name from their habit of impaling captured prey on a thorn, tree fork, or crevice. This "larder" is used to support the victim while it is being eaten, to store prey for later consumption, or to attract mates. Butcherbirds are the ecological counterparts of the shrikes, which are only distantly related, but share the “larder” habit; shrikes are also sometimes called “butcherbirds”. Butcherbirds live in a variety of habitats from tropical rainforest to arid shrubland. Like many similar species, they have adapted well to urbanisation and can be found in leafy suburbs throughout Australia. They are opportunistic, showing little fear and readily taking food offerings to the point of becoming semi-tame. Female butcherbirds lay between two and five eggs in a clutch,〔Jetz, Walter; Sekercioğlu, Cagan H. and Böhning-Gäse, Katrin; (“The Worldwide Variation in Avian Clutch Size across Species and Space” ) Supplementary Material S4〕 with the larger clutch sizes in more open-country species. Except in the rainforest-dwelling hooded and black butcherbirds,〔Coates BJ (1990) ''The birds of Papua New Guinea including the Bismarck Archipelago and Bougainville: Volume II. Passerines.'' Dove Publications: Alderley, Queensland〕 cooperative breeding occurs, with many individuals delaying dispersal to rear young.〔Rowley, Ian (1976); “Co-operative breeding in Australian birds” in ''Proceedings of the 16th International Ornithological Congress''. (ed. Frith HJ, Calaby JH) pp. 657-666. Australian Academy of Science: Canberra.〕 The nest is made from twigs, high up in a fork of a tree. The young will remain with their mother until almost fully grown. They tend to trail behind their mother and “squeak” incessantly while she catches food for them. ==Species== * Black butcherbird, ''Cracticus quoyi'' * Grey butcherbird, ''Cracticus torquatus'' *Silver-backed butcherbird ''Cracticus argenteus'' (alternately a subspecies of ''C. torquatus'') * Hooded butcherbird, ''Cracticus cassicus'' * Tagula butcherbird, ''Cracticus louisiadensis'' * Black-backed butcherbird, ''Cracticus mentalis'' * Pied butcherbird, ''Cracticus 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Butcherbird」の詳細全文を読む スポンサード リンク
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