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Nile Lechwe
The Nile lechwe or Mrs Gray's lechwe (''Kobus megaceros'') is an endangered species of antelope found in swamps and grasslands in Sudan and Ethiopia. Description Males are an average of long and tall at the shoulders, and weigh between , while females are an average of long, tall at the shoulders, and weigh . Nile lechwes live an average of 10 to 11.5 years, and most uncommonly 19 years. Their coats are shaggy with the hair on the cheeks particularly long in both sexes, and males may have even longer hair on their necks. Nile lechwe exhibit extreme sexual dimorphism. Females are golden-brown with white underbellies and no horns. Juveniles also have a golden-brown coat, but the color changes to dark brown in young males when they reach two to three years of age. Adult males are blackish-brown to russet with white 'hoods' over their shoulders and small white patches over their eyes. The horns of the adult males are long, strongly ridged at their bases and are curved at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prague Zoo
Prague Zoological Garden (Czech: ''Zoologická zahrada hl. m. Prahy'') is a zoo in Prague, Czech Republic. It was opened in 1931 with the goal to "advance the study of zoology, protect wildlife, and educate the public" in the district of Troja in the north of Prague. In 2013, the zoo occupied with in use for exhibits, and housed around 5,000 animals from just 676 species, including 132 species listed as threatened. The zoo is rated as the seventh best zoo in the world by Forbes Travel Guide in 2007, and is rated as the fifth best in the world by TripAdvisor. The zoo has contributed significantly to saving Przewalski's horse; for many years, it was the leading breeder of the subspecies. The zoo director is Miroslav Bobek. History The idea for a zoological garden in Prague was first proposed in 1881 in a newspaper article by Count Sweerts-Spork, on the occasion of the marriage of Crown Prince Rudolf of Austria and Princess Stéphanie of Belgium. In 1919, at a meeting of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warble Flies
Warble fly is a name given to the genus ''Hypoderma'': large flies which are parasitic on cattle and deer. Other names include "heel flies", "bomb flies" and "gadflies", while their larvae are often called "cattle grubs" or "wolves." Common species of warble fly include ''Hypoderma bovis'' (the ox warble fly) and ''Hypoderma lineatum'' (the cattle warble fly) and '' Hypoderma tarandi'' (the reindeer warble fly). Larvae of ''Hypoderma'' species also have been reported in horses, sheep, goats and humans. They have also been found on smaller mammals such as dogs, cats, squirrels, voles and rabbits. Adult warble flies are large, hairy and bumblebee-like and brown, orange or yellow in color. The adults have vestigial mouthparts, so they cannot feed during their short lifespans, which can be as little as five days. Piper, R. (2007), ''Extraordinary Animals: An Encyclopedia of Curious and Unusual Animals''. Greenwood Press. They are found on all continents of the Northern Hemisphere, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are considered when assessi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gambela National Park
Gambella National Park, also spelled Gambela National Park, is a large national park in Ethiopia. It is the nation's largest national park and is located several hundred kilometers from Addis Ababa. It was established in 1974, but is not fully protected and has not been effectively managed for much of its history. History Gambella was established during 1974–1975 to protect habitat and wildlife, especially the Nile lechwe and white-eared kob, two antelope species thought to be endangered at the time. Animal populations in the park have declined because of agriculture, cotton farming, hunting, poaching, and the creation of refugee camps, especially following the 1983–1985 famine in Ethiopia and by displaced Sudanese. In 2012, Bantayehu Wasyihun, head of the park's office, said infrastructure development was underway to make Gambella more accommodating to tourists. The park management organization African Parks and Addis Ababa University's Horn of Africa Research Centre work ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machars (Sudan)
, photo = File:West Coast of the Machars - geograph.org.uk - 3085411.jpg , photo_width = , photo_alt = , photo_caption = Luce Bay coastline of The Machars, south of Auchenmalg , map = UK Scotland , map_width = , map_caption = The Machars in the context of Scotland (map marks its highest point near Mochrum) , map_alt = , relief = 1 , label = , label_position = , mark = , marker_size = , location = Wigtownshire, Dumfries & Galloway , grid_ref = , grid_ref_UK = , grid_ref_Ireland = , coordinates = , coordinates_ref = , range = , part_of = , water_bodies = , elevation_ft = , elevation_ref = , surface_elevation_ft = , surface_elevation_ref = , highest_point = Mochrum Fell , highest_elevation = 197m , highest_coords = 54.82, -4.64 , area = ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sudd Swamps
The Sudd (' or ', Dinka: Toc) is a vast swamp in South Sudan, formed by the White Nile's '' Baḥr al-Jabal'' section. The Arabic word ' is derived from ' (), meaning "barrier" or "obstruction". The term "the sudd" has come to refer to any large solid floating vegetation island or mat. The area which the swamp covers is one of the world's largest wetlands and the largest freshwater wetland in the Nile Basin. For many years the swamp, and especially its thicket of vegetation, proved an impenetrable barrier to navigation along the Nile. The ancient Egyptians failed to penetrate the Sudd and reach the areas south of it. In AD 61, a party of Roman soldiers sent by the Emperor Nero proceeded up the White Nile but were not able to get beyond the Sudd, which marked the limit of Roman penetration into equatorial Africa. For the same reasons in later times, the search for the source of the Nile was particularly difficult; it eventually involved overland expeditions from the central Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estrus
The estrous cycle (, originally ) is the set of recurring physiological changes that are induced by reproductive hormones in most mammalian therian females. Estrous cycles start after sexual maturity in females and are interrupted by anestrous phases, otherwise known as "rest" phases, or by pregnancies. Typically, estrous cycles repeat until death. These cycles are widely variable in duration and frequency depending on the species.Bronson, F. H., 1989. Mammalian Reproductive Biology. University of Chicago Press, Chicago, IL, USA. Some animals may display bloody vaginal discharge, often mistaken for menstruation. Many mammals used in commercial agriculture, such as cattle and sheep, may have their estrous cycles artificially controlled with hormonal medications for optimum productivity. The male equivalent, seen primarily in ruminants, is called rut. Differences from the menstrual cycle Mammals share the same reproductive system, including the regulatory hypothalamic syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pregnancy (mammals)
In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation. It begins when a fertilized zygote implants in the female's uterus, and ends once it leaves the uterus. Fertilization and implantation During copulation, the male inseminates the female. The spermatozoon fertilizes an ovum or various ova in the uterus or fallopian tubes, and this results in one or multiple zygotes. Sometimes, a zygote can be created by humans outside of the animal's body in the artificial process of in-vitro fertilization. After fertilization, the newly formed zygote then begins to divide through mitosis, forming an embryo, which implants in the female's endometrium. At this time, the embryo usually consists of 50 cells. Development After implantation A blastocele is a small cavity on the center of the embryo, and the developing embryonary cells will grow around it. Then, a flat layer cell fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominance (ethology)
In biology, a dominance hierarchy (formerly and colloquially called a pecking order) is a type of social hierarchy that arises when members of animal social groups interact, creating a ranking system. A dominant higher-ranking individual is sometimes called an alpha, and the submissive lower-ranking individual a beta. Different types of interactions can result in dominance depending on the species, including ritualized displays of aggression or direct physical violence. In social living groups, members are likely to compete for access to limited resources and mating opportunities. Rather than fighting each time they meet, relative rank is established between individuals of the same sex, with higher-ranking individuals often gaining more access to resources and mates. Based on repetitive interactions, a social order is created that is subject to change each time a dominant animal is challenged by a subordinate one. Definitions Dominance is an individual's preferential acces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Maturity
Sexual maturity is the capability of an organism to reproduce. In humans it might be considered synonymous with adulthood, but here puberty is the name for the process of biological sexual maturation, while adulthood is based on cultural definitions. Most multicellular organisms are unable to sexually reproduce at birth (animals) or germination (e.g. plants): depending on the species, it may be days, weeks, or years until they have developed enough to be able to do so. Also, certain cues may trigger an organism to become sexually mature. They may be external, such as drought (certain plants), or internal, such as percentage of body fat (certain animals). (Such internal cues are not to be confused with hormones, which directly produce sexual maturity – the production/release of those hormones is triggered by such cues.) Role of reproductive organs Sexual maturity is brought about by a maturing of the reproductive organs and the production of gametes. It may also be accompani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzeae
Oryzeae is a tribe of flowering plants in the true grass family, Poaceae. It contains 11 genera, including both cultivated rice ('' Oryza'') and wild rice Wild rice, also called manoomin, Canada rice, Indian rice, or water oats, is any of four species of grasses that form the genus ''Zizania'', and the grain that can be harvested from them. The grain was historically gathered and eaten in both ... (''Zizania''). Genera There are 11 genera classified in two subtribes: References External links * * Oryzoideae Poaceae tribes {{Poaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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