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Pink Pigeon
The pink pigeon (''Nesoenas mayeri'') is a species of pigeon in the family Columbidae endemic to Mauritius. The pink pigeon nearly became extinct in the 1970s and the 1990s and is still very rare. It is the only Mascarene pigeon that has not become extinct. It was on the brink of extinction in 1991 when only 10 individuals remained, but its numbers have increased due to the efforts of the Durrell Wildlife Conservation Trust since 1977. While the population remains at below 500 birds as of 2011, the IUCN downlisted the species from Critically endangered to Endangered on the IUCN Red List in 2000, and then downlisted it again to Vulnerable in 2018. Taxonomy and evolution Initially classified as a true pigeon, the pink pigeon was reclassified in a monotypic genus by Tommaso Salvadori. Recent DNA analyses suggest its nearest relative is the geographically close Malagasy turtle dove (''Streptopelia picturatus''), and it has thus been suggested that it be placed in the genus ''Strep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ﾃ四e Aux Aigrettes
Ile aux Aigrettes is an islet off the south-east coast of Mauritius. It functions as a nature reserve and a scientific research station. It is also a popular visitors attraction - both for tourists and for Mauritians. Geography It has an area of and is the largest islet in the Grand Port bay, off the south-east coast of Mauritius and roughly a kilometer () from the coastal town of Mahebourg. It is low-lying and is formed from coral-limestone (unlike the majority of Mauritius which is from volcanic rock). Nature reserve and conservation ''Ile aux Aigrettes'' conserves the world's only remaining piece of ''"Mauritius Dry Coastal Forest"'' - a once plentiful vegetation type. It is therefore home to a large number of extremely rare or endangered species of plants and animals. Over several hundred years, indigenous flora and fauna was devastated by logging and invasive species. In this sense, the islet shared the same fate as the rest of Mauritius. The Dodo and the indige ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rﾃｩunion Pink Pigeon
The Rﾃｩunion pink pigeon (''Nesoenas mayeri duboisi'', but see below) is an extinct subspecies of pigeon that formerly lived on the Mascarene island of Rﾃｩunion. It is known from the description of a rusty-red pigeon given by Dubois in 1674 and a single subfossil humerus that agrees with that of the pink pigeon of Mauritius in generic characteristics, except being slightly longer. Also, Dubois' reference to the bill being red at the base and the eyes being surrounded by a red ring suggest that this species was closely allied to the Mauritius taxon. Dubois' description was as follows: It is considered a subspecies of the pink pigeon. Its genus '' Nesoenas'' was often synonymized with ''Columba'' in the past, but more recently it has been synonymized with ''Streptopelia''. As the pink pigeon and the Malagasy turtle dove cannot be firmly placed in either of these two genera but apparently represent a distinct lineage that diverged early, probably from the ancestor of ''Streptopeli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crab-eating Macaque
The crab-eating macaque (''Macaca fascicularis''), also known as the long-tailed macaque and referred to as the cynomolgus monkey in laboratories, is a cercopithecine primate native to Southeast Asia. A species of macaque, the crab-eating macaque has a long history alongside humans. The species has been alternately seen as an agricultural pest, a sacred animal, and, more recently, the subject of medical experiments. The crab-eating macaque lives in matrilineal social groups of up to eight individuals dominated by females. Male members leave the group when they reach puberty. It is an opportunistic omnivore and has been documented using tools to obtain food in Thailand and Myanmar. The crab-eating macaque is a known invasive species and a threat to biodiversity in several locations, including Hong Kong and western New Guinea. The significant overlap in macaque and human living space has resulted in greater habitat loss, synanthropic living, and inter- and intraspecies conflicts o ... [...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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gizzard
The gizzard, also referred to as the ventriculus, gastric mill, and gigerium, is an organ found in the digestive tract of some animals, including archosaurs (pterosaurs, crocodiles, alligators, dinosaurs, birds), earthworms, some gastropods, some fish, and some crustaceans. This specialized stomach constructed of thick muscular walls is used for grinding up food, often aided by particles of stone or grit. In certain insects and molluscs, the gizzard features chitinous plates or teeth. Etymology The word ''gizzard'' comes from the Middle English ''giser'', which derives from a similar word in Old French ''gﾃｩsier'', which itself evolved from the Latin ''gigeria'', meaning giblets. Structure In birds Birds swallow food and store it in their crop if necessary. Then the food passes into their glandular stomach, also called the proventriculus, which is also sometimes referred to as the true stomach. This is the secretory part of the stomach. Then the food passes into the gizzard ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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