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Western Grasswren
The western grasswren (''Amytornis textilis''), also referred to as the thick-billed grasswren (western subspecies) and, formerly, as the textile wren, is a species of bird in the family Maluridae. It is endemic to Australia. It was formerly lumped as the nominate subspecies of the thick-billed grasswren. History The species, indeed the genus, was first collected in 1818 on Shark Bay’s Peron Peninsula, in northwest Western Australia, by Jean René Constant Quoy and Joseph Paul Gaimard, naturalists with Louis de Freycinet's circumnavigational exploring expedition in the French corvette ''Uranie''. Although the original specimen was apparently lost with the shipwreck of the ''Uranie'' in the Falkland Islands, it had been illustrated by expedition artist Jacques Arago and was described (as ''Malurus textilis'') by Dumont in 1824. Description A species of ''Amytornis'', the western grasswren is a small, shy, mainly terrestrial bird. It has brown plumage, finely streaked with bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Dumont De Sainte Croix
Charles Henri Frédéric Dumont de Sainte-Croix (27 April 1758 – 8 January 1830) was a French zoologist. A lawyer by trade, he was also an enthusiastic amateur ornithologist.Stresemann, p. 117 Between 1817 and 1818, he described a number of Javanese bird species discovered by Jean Baptiste Leschenault de la Tour; he also contributed articles on ornithology to the ''Dictionnaire des sciences naturelles'', edited and published from 1816 to 1830 by F. G. Levrault. Dumont de Sainte-Croix's daughter, Clémence married René-Primevère Lesson, a surgeon and noted French naturalist. His younger brother, André Dumont was elected to the Convention during the French Revolution The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in coup of 18 Brumaire, November 1799. Many of its .... He was honoured in 1813, in the naming of '' Dumonti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amytornis
Grasswrens (''Amytornis)'' are a genus of birds in the Australasian wren family, Maluridae. Taxonomy and systematics ''Amytornis'' is the only genus classified within the subfamily Amytornithinae, and form a separate clade than the related fairy-wrens and emu-wrens within the family Maluridae. The genus contains thirteen species, many of which are poorly known due to their secretive nature and remote and inaccessible habitat. Extant species The genus contains the following species: Description Grasswrens are the largest members of the Australasian wren family, ranging from for the Eyrean grasswren to the white-throated grasswren. They generally have long tails and legs and short wings and are adapted for life foraging on the ground. The bill is typically shorter and narrower than the fairy-wrens and emu-wrens, which reflects the larger part that seeds play in their diet. The plumage of the grasswrens is cryptic, usually red, buff and brown patterned with white and black. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-arid Climate
A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes. Defining attributes of semi-arid climates A more precise definition is given by the Köppen climate classification, which treats steppe climates (''BSk'' and ''BSh'') as intermediates between desert climates (BW) and humid climates (A, C, D) in ecological characteristics and agricultural potential. Semi-arid climates tend to support short, thorny or scrubby vegetation and are usually dominated by either grasses or shrubs as it usually can't support forests. To determine if a location has a semi-arid climate, the precipitation threshold must first be determined. The method used to find the precipitation threshold (in millimeters): *multiply by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia
''Acacia'', commonly known as the wattles or acacias, is a large genus of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa and Australasia. The genus name is New Latin, borrowed from the Greek (), a term used by Dioscorides for a preparation extracted from the leaves and fruit pods of ''Vachellia nilotica'', the original type of the genus. In his ''Pinax'' (1623), Gaspard Bauhin mentioned the Greek from Dioscorides as the origin of the Latin name. In the early 2000s it had become evident that the genus as it stood was not monophyletic and that several divergent lineages needed to be placed in separate genera. It turned out that one lineage comprising over 900 species mainly native to Australia, New Guinea, and Indonesia was not closely related to the much smaller group of African lineage that contained ''A. nilotica''—the type species. This meant that the Australasian lineage (by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overgrazing
Overgrazing occurs when plants are exposed to intensive grazing for extended periods of time, or without sufficient recovery periods. It can be caused by either livestock in poorly managed agricultural applications, game reserves, or nature reserves. It can also be caused by immobile, travel restricted populations of native or non-native wild animals. Overgrazing reduces the usefulness, productivity, and biodiversity of the land and is one cause of desertification and erosion. Overgrazing is also seen as a cause of the spread of invasive species of non-native plants and of weeds. Degrading land, emissions from animal agriculture and reducing the biomass in a ecosystem contribute directly to climate change. Overgrazing can be reversed or prevented by removing grazers in order to give plants time to recover between grazing events. Successful planned grazing strategies have been support in the American bison of the Great Plains, or migratory Wildebeests of the African savann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat Destruction
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby reducing biodiversity and species abundance. Habitat destruction is the leading cause of biodiversity loss. Fragmentation and loss of habitat have become one of the most important topics of research in ecology as they are major threats to the survival of endangered species. Activities such as harvesting natural resources, industrial production and urbanization are human contributions to habitat destruction. Pressure from agriculture is the principal human cause. Some others include mining, logging, trawling, and urban sprawl. Habitat destruction is currently considered the primary cause of species extinction worldwide. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change, introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emu Volume 9 Plate 20
The emu () (''Dromaius novaehollandiae'') is the second-tallest living bird after its ratite relative the ostrich. It is endemic to Australia where it is the largest native bird and the only extant member of the genus ''Dromaius''. The emu's range covers most of mainland Australia, but the Tasmanian, Kangaroo Island and King Island subspecies became extinct after the European settlement of Australia in 1788. Emus are soft-feathered, brown, flightless birds with long necks and legs, and can reach up to in height. Emus can travel great distances, and when necessary can sprint at ; they forage for a variety of plants and insects, but have been known to go for weeks without eating. They drink infrequently, but take in copious amounts of water when the opportunity arises. Breeding takes place in May and June, and fighting among females for a mate is common. Females can mate several times and lay several clutches of eggs in one season. The male does the incubation; during th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chenopodium
''Chenopodium'' is a genus of numerous species of perennial or annual herbaceous flowering plants known as the goosefoots, which occur almost anywhere in the world. It is placed in the family Amaranthaceae in the APG II system; older classification systems, notably the widely used Cronquist system, separate it and its relatives as Chenopodiaceae, but this leaves the rest of the Amaranthaceae polyphyletic. However, among the Amaranthaceae, the genus ''Chenopodium'' is the namesake member of the subfamily Chenopodioideae. Description The species of ''Chenopodium'' (s.str., description according to Fuentes et al. 2012) are annual or perennial herbs, shrubs or small trees. They generally rely on alkaline soil. They are nonaromatic, but sometimes fetid. The young stems and leaves are often densely covered by vesicular globose hairs, thus looking farinose. Characteristically, these trichomes persist, collapsing later and becoming cup-shaped. The branched stems grow erect, ascen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert Climate
The desert climate or arid climate (in the Köppen climate classification ''BWh'' and ''BWk''), is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert climates are dry and hold little moisture, quickly evaporating the already little rainfall they receive. Covering 14.2% of earth's land area, hot deserts are the second most common type of climate on earth after the polar climate. There are two variations of a desert climate according to the Köppen climate classification: a hot desert climate (''BWh''), and a cold desert climate (''BWk''). To delineate "hot desert climates" from "cold desert climates", there are three widely used isotherms: most commonly a mean annual temperature of , or sometimes the coldest month's mean temperature of , so that a location with a ''BW'' type climate with the appropriate temperature above whichever isotherm is being used is classified as "hot arid sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander William Milligan
Alexander William Milligan (1858 – 30 March 1921) was an Australian accountant, legal clerk, zoological collector and ornithologist. Milligan was born at Sulky Gully, near Ballarat in Victoria. He was educated at Guildford, Victoria. In 1897 he moved to Western Australia where he worked as a temporary accountant with the Department of Lands and Surveys. He was a founding member in 1901 of the Royal Australasian Ornithologists Union, with which he served as a member of the Checklist Committee. He was also the Honorary Consulting Ornithologist to the Western Australian Museum. In 1908 he moved back to Victoria where he died in St Kilda. Several birds were named after him by Gregory Mathews Gregory Macalister Mathews Order of the British Empire, CBE FRSE FZS FLS (10 September 1876 – 27 March 1949) was an Australian-born amateur ornithologist who spent most of his later life in England. Life He was born in Biamble, New South Wal .... References Australian orn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirk Hartog Island
A dirk is a long bladed thrusting dagger.Chisholm, Hugh (ed.), ''Dagger'', The Encyclopædia Britannica, 11th ed., Vol. VII, New York, NY: Cambridge University Press (1910), p. 729 Historically, it gained its name from the Highland Dirk (Scots Gaelic "Dearg") where it was a personal weapon of officers engaged in naval hand-to-hand combat during the Age of SailO'Brian, Patrick, ''Men-of-War: Life In Nelson's Navy'', New York: W.W. Norton & Co., (1974), p. 35 as well as the personal sidearm of Highlanders. It was also the traditional sidearm of the Highland Clansman and later used by the officers, pipers, and drummers of Scottish Highland regiments around 1725 to 1800 and by Japanese naval officers. Etymology The term is associated with Scotland in the Early Modern Era, being attested from about 1600. The term was spelled ''dork'' or ''dirk'' during the 17th century,Head, T.F. ''The Concise Oxford Dictionary of English Etymology'' Oxford University Press (1996) presumed relate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gawler Ranges
The Gawler Ranges are a range of stoney hills in South Australia to the north of Eyre Peninsula. The Eyre Highway skirts the south of the ranges. The Gawler Ranges National Park is in the ranges north of Kimba, South Australia, Kimba and Wudinna, South Australia, Wudinna. The ranges are covered by the Gawler Ranges Native Title Claim. History The traditional owners of the Gawler Ranges are the Barngarla, Kokatha and Wirangu peoples, who have inhabited the area for at least 30,000 years and are now known collectively as the Gawler Ranges Aboriginal People. These Aboriginal Australians, Aboriginal peoples maintained and used rock holes in the granite rock formations as a water source. The ranges were named by Edward John Eyre after the Governor of South Australia, George Gawler in 1839. This was on one of Eyre's Eyre's 1839 expeditions, earlier expeditions before his famous crossing of the Nullarbor Plain further west. It was on this expedition that Edward John Eyre made the fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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