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Réunion Blue Pigeon
The blue pigeons are a genus, ''Alectroenas'', of birds in the dove and pigeon family Columbidae. They are native to islands in the western Indian Ocean. Taxonomy and evolution The genus ''Alectroenas'' was first described in 1840 by the English zoologist George Robert Gray with the Mauritius blue pigeon (''Alectroenas nitidissimus'') as the type species. The genus name combines the Ancient Greek ''alektruōn'', meaning "domestic cock", and ''oinas'', meaning "pigeon". The ''Alectroenas'' blue pigeons are closely interrelated and occur widely throughout islands in the western Indian Ocean. They are allopatric and can therefore be regarded as a superspecies. There are three extant species: the Madagascar blue pigeon, the Comoros blue pigeon, and the Seychelles blue pigeon. The three Mascarene islands were home to one species each, which are all extinct; the Mauritius blue pigeon, the Rodrigues blue pigeon, and the Réunion blue pigeon. The blue pigeons perhaps colonised the Masc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetics
Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinians, Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene. Phenotypic trait, Trait inheritance and Molecular genetics, molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded to study the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the Cell (bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sieur Dubois
Sieur Dubois () or Sieur D. B. was a French traveller who reached the islands of Madagascar and Réunion at the time of early colonization by France. He wrote a book in French, published in 1674, about his journeys and the wildlife he saw including details of several species of birds endemic to Réunion that have since become extinct, such as the Réunion ibis The Réunion ibis or Réunion sacred ibis (''Threskiornis solitarius'') is an list of extinct birds, extinct species of ibis that was endemic to the volcanic island of Réunion in the Indian Ocean. The first subfossil remains were found in 1974 ..., Réunion swamphen, and Réunion rail.Dubois (1674) Captain Samuel Pasfield Oliver translated and edited the original French version into an English version, which was published in 1897.Dubois (translated and edited by Oliver) (1897). Editor's preface References Cited texts * * 17th-century French explorers French travel writers French naturalists 17th-century ps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion
Réunion (; ; ; known as before 1848) is an island in the Indian Ocean that is an overseas departments and regions of France, overseas department and region of France. Part of the Mascarene Islands, it is located approximately east of the island of Madagascar and southwest of the island of Mauritius. , it had a population of 896,175. Its capital and largest city is Saint-Denis, La Réunion, Saint-Denis. Réunion was uninhabited until French immigrants and colonial subjects settled the island in the 17th century. Its tropical climate led to the development of a plantation economy focused primarily on sugar; slaves from East Africa were imported as fieldworkers, followed by Malays, Annamite, Vietnamese, Chinese, and Indians as indentured laborers. Today, the greatest proportion of the population is of mixed descent, while the predominant language is Réunion Creole, though French remains the sole official language. Since 1946, Réunion has been governed as a regions of France, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ducula
''Ducula'' is a genus of the pigeon family Columbidae, collectively known as imperial pigeons. They are large to very large pigeons with a heavy build and medium to long tails. They are arboreal, feed mainly on fruit and are closely related to the other genus of fruit-eating doves, ''Ptilinopus''. Both genera display brightly coloured plumage, predominantly green, often with contrasting under-parts of purple, orange or red. Some ''Ducula'' have prominently swollen ceres. They have large gapes and swallow seeds whole, playing an important role in seed dispersal. Imperial pigeons are found in forests of southern Asia, New Guinea, northern Australia and the Pacific islands. Many species are nomadic, travelling long distances to exploit seasonal fruit sources. Some undertake migrations and all are strong fliers. Because of habitat loss and predation, species of ''Ducula'' are amongst the most threatened of avian species globally. Taxonomy The genus ''Ducula'' was introduced in 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallicolumba
''Gallicolumba'' is a mid-sized genus of ground-dwelling doves (family (biology), family Columbidae), most of which occur in rainforests on the Philippines. Local name 'punay' which is a general term for pigeons and doves. They are not closely related to the American ground doves genus (Columbina (genus), ''Columbina'' and related genera). Rather, the present genus is closest to the thick-billed ground pigeon. The Filipino species are known as bleeding-hearts due to their vivid-red patch on the breast, which looks startlingly like a bleeding wound in some species and has reminded natural history, naturalists of a dagger stab. The diet of doves of this genus consists of fruits and seed. Systematics and extinctions ''Gallicolumba'' might be ranked as a (very small) subfamily, but the available data suggests that they are better considered part of a quite basal (evolution), basal evolutionary radiation, radiation of Columbidae which consists of many small and often bizarre lineages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rodrigues Pigeon
The Rodrigues pigeon or Rodrigues dove (''Nesoenas rodericanus'') is an extinct species of pigeon formerly endemic to the Mascarene island of Rodrigues (island), Rodrigues. It is known from a subfossil sternum and some other bones, and the descriptions of François Leguat, Leguat (1708) and Julien Tafforet (1726). Taxonomy This bird was assigned to the genus ''Alectroenas'', but this was erroneous. It is most similar to that of the ground doves (''Gallicolumba'') or to a miniature version of the sternum of an imperial pigeon (''Ducula''). If this similarity is not based on Convergent evolution, convergence, considering the evolutionary relationships of the dodo and the Rodrigues solitaire, the Rodrigues pigeon is quite possibly the closest relative of the Raphidae that was still alive in historic times. This does not mean that there is any close relationship between this bird and the didine pigeons, only that both derived, independently, from the same Indo-Asiatic lineage, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Providence Blue Pigeon
The Providence blue pigeon (''Alectroenas'' sp.), also known as the Farquhar Islands blue pigeon or small blue pigeon is an extinct species of bird that lived on Farquhar, Providence, and St. Pierre in the Seychelles. Description The Providence blue pigeon was a species of blue pigeon that most likely looked very similar to the Seychelles blue pigeon. It may even have been the same species as the Seychelles blue pigeon, although it is possible that it was a distinct species. It nested on Mapou trees and other similar trees. In 1821–1822 it was said that they were in great abundance in Farquhar. They were known to be incredibly tame, and nearly impossible to disturb. History In an excerpt from a document from Fairfax Moresby Admiral of the Fleet Sir Fairfax Moresby GCB (29 November 1786 – 21 January 1877) was a Royal Navy officer. As a junior officer he took part in the unsuccessful expedition to capture Ferrol in Spain during the French Revolutionary Wars. He ..., ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceania
Oceania ( , ) is a region, geographical region including Australasia, Melanesia, Micronesia, and Polynesia. Outside of the English-speaking world, Oceania is generally considered a continent, while Mainland Australia is regarded as its continental landmass. Spanning the Eastern Hemisphere, Eastern and Western Hemisphere, Western hemispheres, at the centre of the land and water hemispheres, water hemisphere, Oceania is estimated to have a land area of about and a population of around 46.3 million as of 2024. Oceania is the smallest continent in land area and the list of continents and continental subregions by population, second-least populated after Antarctica. Oceania has a diverse mix of economies from the developed country, highly developed and globally competitive market economy, financial markets of Australia, French Polynesia, Hawaii, New Caledonia, and New Zealand, which rank high in quality of life and Human Development Index, to the much least developed countries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeast Asia
Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Australia, Australian mainland, which is part of Oceania. Southeast Asia is bordered to the north by East Asia, to the west by South Asia and the Bay of Bengal, to the east by Oceania and the Pacific Ocean, and to the south by Australia (continent), Australia and the Indian Ocean. Apart from the British Indian Ocean Territory and two out of Atolls of the Maldives, 26 atolls of the Maldives in South Asia, Maritime Southeast Asia is the only other subregion of Asia that lies partly within the Southern Hemisphere. Mainland Southeast Asia is entirely in the Northern Hemisphere. Timor-Leste and the southern portion of Indonesia are the parts of Southeast Asia that lie south of the equator. The region lies near the intersection of Plate tectonics, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptilinopus
The fruit doves, also known as fruit pigeons, are a genus (''Ptilinopus'') of birds in the pigeon and dove family (Columbidae). These colourful, frugivorous doves are found in forests and woodlands in Southeast Asia and Oceania. It is a large genus with over 50 species, some threatened or already extinct. Taxonomy The genus ''Ptilinopus'' was introduced in 1825 by the English naturalist William Swainson with the rose-crowned fruit dove (''Ptilinopus regina'') as the type species. The genus name combines the Ancient Greek words meaning "down feather" with meaning "foot". The many species of this genus can be further grouped by geography and by certain shared characteristics. The fruit doves of the Sunda Islands and northern Australia, such as the pink-headed fruit dove and banded fruit dove, have comparatively longer tails than other species, and are notable for their solid colouration on the head, neck and breast, with a black band across the belly. Another grouping can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
