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Psittacula Exsul
Newton's parakeet (''Psittacula exsul''), also known as the Rodrigues parakeet or Rodrigues ring-necked parakeet, is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues in the western Indian Ocean. Several of its features diverged from related species, indicating long-term isolation on Rodrigues and subsequent adaptation. The rose-ringed parakeet of the same genus is a close relative and probable ancestor. Newton's parakeet may itself have been ancestral to the endemic parakeets of nearby Mauritius and Réunion. Around long, Newton's parakeet was roughly the size of a rose-ringed parakeet. Its plumage was mostly greyish or slate blue in colour, which is unusual in ''Psittacula'', a genus containing mostly green species. The male had stronger colours than the female and possessed a reddish instead of black beak, but details of a mature male's appearance are uncertain; only one male specimen is known, and it is believed to be immature. Mature ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Newton
Alfred Newton FRS HFRSE (11 June 18297 June 1907) was an English zoologist and ornithologist. Newton was Professor of Comparative Anatomy at Cambridge University from 1866 to 1907. Among his numerous publications were a four-volume ''Dictionary of Birds'' (1893–6), entries on ornithology in the Encyclopædia Britannica (9th edition) while also an editor of the journal ''Ibis'' from 1865 to 1870. In 1900 he was awarded the Royal Medal of the Royal Society and the Gold Medal of the Linnaean Society. He founded the British Ornithologists Union. Life Alfred Newton was born near Geneva in Switzerland, the fifth son of William Newton of Elveden Hall in Suffolk, Member of Parliament (MP) for ; his mother Elizabeth (1789–1843) was the daughter of Richard Slater Milnes, MP for . The family wealth was founded on sugar plantations in the Caribbean, where Alfred's grandfather Samuel Newton had a plantation in St Kitts, and a property in St Croix. William Newton returned to E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beak
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food, courtship, and feeding young. The terms ''beak'' and '' rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a beak-like structure), sirens, pufferfish, billfishes and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections – the upper and lower mandibles – are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the word "beak" was, in the past, generally restricted to the sharpened ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marooning
Marooning is the intentional act of abandoning someone in an uninhabited area, such as a desert island, or more generally (usually in passive voice) to be marooned is to be in a place from which one cannot escape. The word is attested in 1699, and is derived from the term maroon, a word for a fugitive slave, which could be a corruption of Spanish ''cimarrón'' (rendered as "symeron" in 16th–17th century English), meaning a household animal (or slave) who has "run wild". The practice was a penalty for crewmen, or for captains at the hands of a crew in cases of mutiny. Generally, a marooned man was set on a deserted island, often no more than a sand bar at low tide. He would be given some food, a container of water, and a loaded pistol so he could die by suicide if he desired. The outcome of marooning was usually fatal, but William Greenaway and some men loyal to him survived being marooned, as did pirate captain Edward England. The chief practitioners of marooning were 17th a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Huguenot
The Huguenots ( , also , ) were a religious group of French Protestants who held to the Reformed, or Calvinist, tradition of Protestantism. The term, which may be derived from the name of a Swiss political leader, the Genevan burgomaster Bezanson Hugues (1491–1532?), was in common use by the mid-16th century. ''Huguenot'' was frequently used in reference to those of the Reformed Church of France from the time of the Protestant Reformation. By contrast, the Protestant populations of eastern France, in Alsace, Moselle, and Montbéliard, were mainly Lutherans. In his ''Encyclopedia of Protestantism'', Hans Hillerbrand wrote that on the eve of the St. Bartholomew's Day massacre in 1572, the Huguenot community made up as much as 10% of the French population. By 1600, it had declined to 7–8%, and was reduced further late in the century after the return of persecution under Louis XIV, who instituted the ''dragonnades'' to forcibly convert Protestants, and then finally revoked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psittacula Exsul
Newton's parakeet (''Psittacula exsul''), also known as the Rodrigues parakeet or Rodrigues ring-necked parakeet, is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues in the western Indian Ocean. Several of its features diverged from related species, indicating long-term isolation on Rodrigues and subsequent adaptation. The rose-ringed parakeet of the same genus is a close relative and probable ancestor. Newton's parakeet may itself have been ancestral to the endemic parakeets of nearby Mauritius and Réunion. Around long, Newton's parakeet was roughly the size of a rose-ringed parakeet. Its plumage was mostly greyish or slate blue in colour, which is unusual in ''Psittacula'', a genus containing mostly green species. The male had stronger colours than the female and possessed a reddish instead of black beak, but details of a mature male's appearance are uncertain; only one male specimen is known, and it is believed to be immature. Mature ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclone
In meteorology, a cyclone () is a large air mass that rotates around a strong center of low atmospheric pressure, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere as viewed from above (opposite to an anticyclone). Cyclones are characterized by inward-spiraling winds that rotate about a zone of low-pressure area, low pressure. The largest low-pressure systems are polar vortex, polar vortices and extratropical cyclones of the largest scale (the synoptic scale). Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes, and dust devils lie within smaller mesoscale meteorology, mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropical upper tropospheric trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars, Jupiter, and Neptune. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
