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Houbara Bustard
The houbara bustard (''Chlamydotis undulata''), also known as African houbara, is a relatively small bustard native to North Africa, where it lives in arid habitats. The global population is listed as Vulnerable on the IUCN Red List since 2014. There is a population in the Canary Islands which has been assessed as Near Threatened in 2015. It is dull brown with black markings on the wings, a greyish neck and a black ruff along the side of the neck. Males are larger and heavier than females. Description The houbara bustard is a small to mid-sized bustard. It measures in length and spans across the wings. It is brown above and white below, with a black stripe down the sides of its neck. In flight, the long wings show large areas of black and brown on the flight feathers. The sexes are similar, but the female, at tall, is rather smaller and greyer above than the male, at tall. The body mass is in males and in females.''CRC Handbook of Avian Body Masses'' by John B. Dunning J ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joseph Franz Von Jacquin
Joseph "Krystel" Franz Freiherr von Jacquin or Baron Joseph von Jacquin (7 February 1766, in Schemnitz (now Banská Štiavnica) – 26 October 1839, in Vienna) was an Austrian Empire, Austrian scientist who studied medicine, chemistry, zoology and botany. The son of Nikolaus von Jacquin, he graduated from the University of Vienna as a doctor of medicine in 1788. Between 1788 and 1791 Jacquin was sent on a scientific journey to Germany, France and England by Francis II, Holy Roman Emperor, Emperor Francis II. He inherited his father's position as professor of botany and chemistry at the University of Vienna, which he held from 1797 until his retirement in 1838. In 1821, he was elected a foreign member of the Royal Swedish Academy of Sciences. Notes Publications Jacquin, J. F. ''Beyträge zur Geschichte der Vögel''. C.F. Wappler, Wien 1784. Jacquin, J.F. ''Lehrbuch der allgemeinen und medicinischen Chymie zum Gebrauche seiner Vorlesungen''. C.F. Wappler, Wien 1798. Jacqu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernst Hartert
Ernst Johann Otto Hartert (29 October 1859 – 11 November 1933) was a widely published German ornithologist. Life and career Hartert was born in Hamburg, Germany on 29 October 1859. In July 1891, he married the illustrator Claudia Bernadine Elisabeth Hartert in Frankfurt am Main, Germany, with whom he had a son named Joachim Karl (Charles) Hartert, (1893–1916), who was killed as an English soldier on the Somme. Together with his wife, he was the first to describe the blue-tailed Buffon hummingbird subspecies (''Chalybura buffonii intermedia'' Hartert, E & Hartert, C, 1894). The article ''On a collection of Humming Birds from Ecuador and Mexico'' appears to be their only joint publication. Hartert was employed by Walter Rothschild, 2nd Baron Rothschild as ornithological curator of Rothshild's private Natural History Museum at Tring, in England from 1892 to 1929. Hartert published the quarterly museum periodical ''Novitates Zoologicae'' (1894–39) with Rothschild, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mauritania
Mauritania (; ar, موريتانيا, ', french: Mauritanie; Berber: ''Agawej'' or ''Cengit''; Pulaar: ''Moritani''; Wolof: ''Gànnaar''; Soninke:), officially the Islamic Republic of Mauritania ( ar, الجمهورية الإسلامية الموريتانية), is a sovereign country in West Africa. It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast, Mali to the east and southeast, and Senegal to the southwest. Mauritania is the 11th-largest country in Africa and the 28th-largest in the world, and 90% of its territory is situated in the Sahara. Most of its population of 4.4 million lives in the temperate south of the country, with roughly one-third concentrated in the capital and largest city, Nouakchott, located on the Atlantic coast. The country's name derives from the ancient Berber kingdom of Mauretania, located in North Africa within the ancient Maghreb. Berbers occupied what is now Mauritania ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nile
The Nile, , Bohairic , lg, Kiira , Nobiin language, Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the List of rivers by length, longest river in the world, though this has been contested by research suggesting that the Amazon River is slightly longer.Amazon Longer Than Nile River, Scientists Say Of the world's major rivers, the Nile is one of the smallest, as measured by annual flow in cubic metres of water. About long, its drainage basin covers eleven countries: the Democratic Republic of the Congo, Tanzania, Burundi, Rwanda, Uganda, Kenya, Ethiopia, Erit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canarian Houbara
The Canarian houbara (''Chlamydotis undulata fuertaventurae)'' is a large bird in the bustard family. It is a houbara bustard subspecies which is endemic to the eastern Canary archipelago, in Macaronesia in the North Atlantic Ocean, where it is a scarce and threatened non-migratory resident. It is the animal symbol of the island of Fuerteventura. Taxonomy The Canarian houbara is one of three subspecies of the houbara bustard. Archaeological evidence indicates that it has been present in the Canary Islands for 130–170,000 years. However, genetic data point to a more recent separation of ''C. u. fuertaventurae'' from the nominate subspecies around 20–25,000 years ago. It suggests that there was an initial colonisation of the Canary Islands about 130,000 years ago, followed by a second colonisation 19-30 000 years ago, with subsequent isolation until today. Description The Canarian houbara is distinguished from the other two subspecies by its smaller size, less sandy colourin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Ancestor
Common descent is a concept in evolutionary biology applicable when one species is the ancestor of two or more species later in time. All living beings are in fact descendants of a unique ancestor commonly referred to as the last universal common ancestor (LUCA) of all life on Earth, according to modern evolutionary biology. Common descent is an effect of speciation, in which multiple species derive from a single ancestral population. The more recent the ancestral population two species have in common, the more closely are they related. The most recent common ancestor of all currently living organisms is the last universal ancestor, which lived about 3.9 billion years ago. The two earliest pieces of evidence for life on Earth are graphite found to be biogenic in 3.7 billion-year-old metasedimentary rocks discovered in western Greenland and microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. All currently living organisms on Earth shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetic Divergence
Genetic divergence is the process in which two or more populations of an ancestral species accumulate independent genetic changes (mutations) through time, often leading to reproductive isolation and continued mutation even after the populations have become Reproductive isolation, reproductively isolated for some period of time, as there isn’t genetic exchange anymore. In some cases, subpopulations living in ecologically distinct peripheral environments can exhibit genetic divergence from the remainder of a population, especially where the range of a population is very large (see parapatric speciation). The genetic differences among divergent populations can involve silent mutations (that have no effect on the phenotype) or give rise to significant Morphology (biology), morphological and/or physiology, physiological changes. Genetic divergence will always accompany reproductive isolation, either due to novel adaptations via selection and/or due to genetic drift, and is the principal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mitochondrial DNA
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial DNA is only a small portion of the DNA in a eukaryotic cell; most of the DNA can be found in the cell nucleus and, in plants and algae, also in plastids such as chloroplasts. Human mitochondrial DNA was the first significant part of the human genome to be sequenced. This sequencing revealed that the human mtDNA includes 16,569 base pairs and encodes 13 proteins. Since animal mtDNA evolves faster than nuclear genetic markers, it represents a mainstay of phylogenetics and evolutionary biology. It also permits an examination of the relatedness of populations, and so has become important in anthropology and biogeography. Origin Nuclear and mitochondrial DNA are thought to be of separate evolutionary origin, with the mtDNA being derived ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydotis Undulata On Lanzarote, June 2013 (2)
'' Chlamydotis '' is a genus of large birds in the bustard family. The genus name is from Ancient Greek ''khlamus'', a horseman's cloak with weights sewn into the corners, and ''otis'', bustard. Members of this genus show very little sexual dimorphism in their plumage. The clade consists of two extant species, formerly considered to be conspecific forms a sister group within the clade that includes the genus ''Otis''. The genus was established by the French naturalist René Primevère Lesson in 1839 and included only one species which was formerly described in the genus ''Otis''. The genus name of ''Houbara'' was used by Charles Lucien Bonaparte but this was dropped, being a ''nomen nudum'', as not following the requirements for zoological names. MacQueen's was split on the basis of distinctive display, differences in feather colours and on the basis of well established genetic differences. The two species are thought to have separated during a period of extreme aridity around ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Birds (magazine)
''British Birds'' is a monthly ornithology magazine that was established in 1907. It is now published by BB 2000 Ltd, which is wholly owned by The British Birds Charitable Trust (registered charity number 1089422), established for the benefit of British ornithology. Its circulation in 2000 was 5,250 copies; its circulation peaked at 11,000 in the late 1980s. The current editor is Stephen Menzie. ''British Birds'' is aimed at serious birdwatchers and ornithologists, rather than the more casual birdwatchers catered for by some other magazines on the subject. It publishes the findings of the British Birds Rarities Committee. Its mascot, and later logo, the red grouse, was chosen because at the time it was thought to be an endemic British species (although it is now considered a subspecies of the willow grouse). In 1916, ''British Birds'' magazine absorbed ''The Zoologist'', due to the latter's shortage of subscribers. Editors The current editor of ''British Birds'' is Stephen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Ornithologists' Union's Taxonomic Records Committee
The British Ornithologists' Union (BOU) aims to encourage the study of birds ("ornithology") and around the world, in order to understand their biology and to aid their conservation. The BOU was founded in 1858 by Professor Alfred Newton, Henry Baker Tristram and other scientists. Its quarterly journal, ''Ibis'', has been published continuously since 1859. The Records Committee (BOURC) is a committee of the BOU established to maintain the British List, the official list of birds recorded in Great Britain. BOU is headquartered in Peterborough and is a registered charity in England & Wales and Scotland. Objectives and activities * Publishes ''Ibis'' as a leading international journal of ornithological science. * Organises a programme of meetings and conferences. * Awards grants and bursaries for ornithological research. * Encourages liaison between those actively engaged in ornithological research. * Provides a representative body of the scientific community able to provide o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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