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Cracticus Torquatus Singing - Christopher Watson (cropped)
''Cracticus'' is a genus of butcherbirds native to Australasia. They 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. Taxonomy The genus ''Cracticus'' was introduced by the French ornithologist Louis Jean Pierre Vieillot in 1816 with the hooded butcherbird (''Cracticus cassicus'') as the type species. The name is from the Ancient Greek ''kraktikos '' meaning "noisy" or "clamorous". Together with three species of currawong (''Strepera'') and two species of ''Peltops'', the black butcherbird (''Melloria quoyi''), and the Australian magpie (''Gymnorhina tibicen''), they form the subfamily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grey Butcherbird
The grey butcherbird (''Cracticus torquatus'') is a widely distributed species endemic to Australia. It occurs in a range of different habitats including arid, semi-arid and temperate zones. It is found across southern Australia, but is absent from the deserts of central Australia and the monsoon tropics of northern Australia. It has a characteristic "rollicking" birdsong. It appears to be adapting well to city living, and can be encountered in the suburbs of many Australian cities including Brisbane, Melbourne, and Sydney. The grey butcherbird preys on small vertebrates including other birds. Other birds in the same family include the Australian magpie, the currawongs, woodswallows and other members of the butcherbird genus ''Cracticus''. Taxonomy The grey butcherbird was first described by the English ornithologist John Latham in 1801 under the binomial name ''Lanius torquatus''. Closely related species include the silver-backed butcherbird (''Cracticus argenteus'') and t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hooded Butcherbird (Cracticus Cassicus) Perched On Branch (cropped)
The hooded butcherbird (''Cracticus cassicus'') is a species of passerine bird in the family Artamidae. It is found in New Guinea. Its natural habitat is subtropical or tropical moist lowland forest. Taxonomy The hooded butcherbird was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1780 in his '' Histoire Naturelle des Oiseaux'' from a specimen collected in New Guinea by the naturalist Pierre Sonnerat. The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the ''Planches Enluminées D'Histoire Naturelle'' which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name ''Ramphastos cassicus'' in his catalogue of the ''Planches Enluminées''. The type locality was restricted to Vogelkop (Bird's Head Peninsula), northwest New Guinea, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clutch (animal)
__NOTOC__ A clutch of eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest. In birds, destruction of a clutch by predators (or removal by humans, for example the California condor breeding program) results in ''double-clutching''. The technique is used to double the production of a species' eggs, in the California condor case, specifically to increase population size. The act of putting one's hand in a nest to remove eggs is known as "dipping the clutch". Size Clutch size differs greatly between species, sometimes even within the same genus. It may also differ within the same species due to many factors including habitat, health, nutrition, predation pressures, and time of year. Clutch size variation can also reflect variation in optimal reproduction effort. In birds, clutch size can vary within a species due to various features (age and health of laying female, ability of male to supply food, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Domestication
Domestication is a sustained multi-generational relationship in which humans assume a significant degree of control over the reproduction and care of another group of organisms to secure a more predictable supply of resources from that group. A broader biological definition is that it is a coevolutionary process that arises from a mutualism, in which one species (the domesticator) constructs an environment where it actively manages both the survival and reproduction of another species (the domesticate) in order to provide the former with resources and/or services. The domestication of plants and animals by humans was a major cultural innovation ranked in importance with the conquest of fire, the manufacturing of tools, and the development of verbal language. Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors. He was also the first to recognize the difference between conscious selective breeding (i.e. artificial s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urbanization
Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly the process by which town A town is a human settlement. Towns are generally larger than villages and smaller than city, cities, though the criteria to distinguish between them vary considerably in different parts of the world. Origin and use The word "town" shares ...s and City, cities are formed and become larger as more people begin living and working in central areas. Although the two concepts are sometimes used interchangeably, urbanization should be distinguished from Urban sprawl, urban growth. Urbanization refers to the ''proportion'' of the total national population living in areas classified as urban, whereas urban growth strictly refers to the ''absolute'' number of people living in those areas. It is predicted that by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tropical Rainforest
Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as ''lowland equatorial evergreen rainforest''. True rainforests are typically found between 10 degrees north and south of the equator (see map); they are a sub-set of the tropical forest biome that occurs roughly within the 28-degree latitudes (in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn). Within the World Wildlife Fund's biome classification, tropical rainforests are a type of tropical moist broadleaf forest (or tropical wet forest) that also includes the more extensive seasonal tropical forests. Overview Tropical rainforests are characterized by two words: hot and wet. Mean monthly temperatures exceed during all months of the year. Average annual rainfall is no less than and can exceed although it typically lies betwee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrike
Shrikes () are passerine birds of the family Laniidae. The family is composed of 34 species in four genera. The family name, and that of the largest genus, '' Lanius'', is derived from the Latin word for "butcher", and some shrikes are also known as butcherbirds because of their feeding habits. The common English name shrike is from Old English , alluding to the shrike's shriek-like call. Distribution, migration, and habitat Most shrike species have a Eurasian and African distribution, with just two breeding in North America (the loggerhead and northern shrikes). No members of this family occur in South America or Australia, although one species reaches New Guinea. The shrikes vary in the extent of their ranges, with some species, such as the great grey shrike, ranging across the Northern Hemisphere; to the Newton's fiscal, which is restricted to the island of São Tomé. They inhabit open habitats, especially steppe and savannah. A few species of shrikes are forest dwel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insectivore
A robber fly eating a hoverfly An insectivore is a carnivorous animal or plant that eats insects. An alternative term is entomophage, which can also refer to the human practice of eating insects. The first vertebrate insectivores were amphibians. When they evolved 400 million years ago, the first amphibians were piscivores, with numerous sharp conical teeth, much like a modern crocodile. The same tooth arrangement is however also suited for eating animals with exoskeletons, thus the ability to eat insects is an extension of piscivory. At one time, insectivorous mammals were scientifically classified in an order called Insectivora. This order is now abandoned, as not all insectivorous mammals are closely related. Most of the Insectivora taxa have been reclassified; those that have not yet been reclassified and found to be truly related to each other remain in the order Eulipotyphla. Although individually small, insects exist in enormous numbers. Insects make u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melloria Quoyi
The black butcherbird (''Melloria quoyi'', also known as ''Cracticus quoyi'') is a species of butcherbird in the family Artamidae. It is found in Australia, Indonesia, and Papua New Guinea. Its natural habitats are subtropical or tropical dry forest, subtropical or tropical moist lowland forest, and subtropical or tropical mangrove forest. Taxonomy Evidence was published in a 2013 molecular study which showed that it was the sister taxon to the Australian magpie (''Gymnorhina tibicen''). The ancestor to the two species is thought to have split from the other butcherbirds between 8.3 and 4.2 million years ago, during the late Miocene to early Pliocene, while the two species themselves diverged sometime during the Pliocene (5.8–3.0 million years ago). Description The adult is black all over except for its beak which is black-tipped grey. The juvenile is rufous-brown. As the only butcherbirds with wholly black bodies, they are sometimes confused with crows or currawongs, from wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pied Butcherbird
The pied butcherbird (''Cracticus nigrogularis'') is a songbird native to Australia. Described by John Gould in 1837, it is a black and white bird long with a long hooked bill. Its head and throat are black, making a distinctive hood; the mantle and much of the tail and wings are also black. The neck, underparts and outer wing feathers are white. The juvenile and immature birds are predominantly brown and white. As they mature their brown feathers are replaced by black feathers. There are two recognised subspecies of pied butcherbird. Within its range, the pied butcherbird is generally sedentary. Common in woodlands and in urban environments, it is carnivorous, eating insects and small vertebrates including birds. A tame and inquisitive bird, the pied butcherbird has been known to accept food from humans. It nests in trees, constructing a cup-shaped structure out of sticks and laying two to five eggs. The pied butcherbird engages in cooperative breeding, with a mated pair som ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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