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Merriam's Elk
The Merriam's elk (''Cervus canadensis merriami'') is an extinct subspecies of elk once found in the arid lands of the southwestern United States (in Arizona, New Mexico and Texas), as well as in Mexico. Uncontrolled hunting and cattle grazing since the arrival of Europeans had driven the subspecies into extinction around the beginning of the 20th century, with the exact presumed date being 1906. Another subspecies of elk, the eastern elk (''Cervus canadensis canadensis'') also became extinct at roughly the same time. Not much else is known about this subspecies as it became extinct before studies were done. Elk from Yellowstone National Park were introduced to this area in 1913, and are reasonably common in the area today. As of 2017, the International Union for Conservation of Nature (IUCN) has reclassified all North American elk subspecies aside from the tule and Roosevelt elk as C. c. canadensis. If this is accurate, this means that the subspecies is not extinct See also *R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Christian Polycarp Erxleben
Johann Christian Polycarp Erxleben was a German natural history, naturalist from Quedlinburg. Erxleben was professor of physics and veterinary medicine at the University of Göttingen. He wrote ''Anfangsgründe der Naturlehre'' (1772) and ''Systema regni animalis'' (1777). He was founder of the first and oldest academic veterinary school in Germany, the Institute of Veterinary Medicine, in 1771. He was the son of Dorothea Christiane Erxleben, the first woman in Germany to earn a medical degree. Works * 1767 ''Einige Anmerkungen über das Insektensystem des Hr. Geoffroy und die Schäfferschen Verbesserungen desselben''. Hannoverisches Magazin, Hannover (Stück 20). 305–316. * 1772 ''Anfangsgründe der Naturlehre''. Göttingen und Gotha, Dieterich 648 p., 8 Taf. * 1775 ''Anfangsgründe der Chemie'' . Göttingen, Dieterich, 472pDigital editionby the University and State Library Düsseldorf * 1769–1778 Peter Simon Pallas, Pallas, P. S., Ernst Gottfried Baldinger, Baldinger, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roosevelt Elk
The Roosevelt elk (''Cervus canadensis roosevelti)'', also known commonly as the Olympic elk and Roosevelt's wapiti, is the largest of the four surviving subspecies of elk (''Cervus canadensis'') in North America by body mass (although by antler size, both the Boone and Crockett (rifle) and Pope and Young (bow) records have Rocky Mountain elk being larger; none of the top 10 Roosevelt elk would score in the top 20 of Pope and Young's Rocky Mountain elk. In both species, mature bulls weigh from 700 to 1200 lbs. with very rare large bulls weighing more.) Its geographic range includes temperate rainforests of the Pacific Northwest, extending to parts of northern California. It was introduced to Alaska's Afognak, Kodiak, and Raspberry Islands in 1928 and reintroduced to British Columbia's Sunshine Coast from Vancouver Island in 1986. In December 1897, mammalogist C. Hart Merriam named the species after his friend Theodore Roosevelt, then Assistant Secretary of the US Navy. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct Animals Of The United States
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct Mammals
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal Extinctions Since 1500
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla (cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together with Sauropsida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elk And Red Deer
The elk (''Cervus canadensis''), also known as the wapiti, is one of the largest species within the deer family, Cervidae, and one of the largest terrestrial mammals in its native range of North America and Central and East Asia. The common name of "elk" is open to confusion, as "elk" is the name used in British English for the larger ''Alces alces'', with similar names used by other European languages (German ''Elch'', Swedish ''älg'', and French ''élan''). In North America, the common name for ''Alces alces'' is "moose". The name "wapiti" is sometimes used for ''Cervus canadensis'', which derives from the Shawnee and Cree word ''waapiti'', meaning 'white rump'. Elk range in forest and forest-edge habitat, feeding on grasses, plants, leaves, and bark. Male elk have large antlers which they shed each year. Males also engage in ritualized mating behaviors during the rut, including posturing, antler wrestling (sparring), and ''bugling'', a loud series of vocalizations that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Extinct Animals Of North America
This list of North American animals extinct in the Holocene features animals known to have become extinct in the last 12,000 years on the North American continent. Animals recently extinct in the West Indies and Hawaii are in their own respective lists. Many extinction dates are unknown due to a lack of relevant information. Mammals Prehistoric Recent Local Birds Prehistoric Recent Local Reptiles Amphibians Fish Recent Local Crustaceans Insects Arachnids Molluscs Undated Recent See also * Holocene extinction * Timeline of extinctions in the Holocene * Settlement of the Americas * List of South American animals extinct in the Holocene * List of extinct animals * List of extinct animals of the Hawaiian Islands * List of extinct birds * Extinct in the wild * Lazarus taxon * U.S. Fish and Wildlife Service * IUCN Red List of Threatened Species Notes References {{Extinct Animals by Regions , state=autocollapsed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Elk
The eastern elk (''Cervus canadensis canadensis'') is an extinct subspecies or distinct population of elk that inhabited the northern and eastern United States, and southern Canada. The last eastern elk was shot in Pennsylvania on September 1, 1877. The subspecies was declared extinct by the United States Fish and Wildlife Service in 1880. Another subspecies of elk, the Merriam's elk, also became extinct at roughly the same time. As of 2017, the International Union for Conservation of Nature (IUCN) has reclassified all North American elk subspecies aside from the tule and Roosevelt elk as ''C. c. canadensis''. If this is accurate, this means that the subspecies is not extinct, and has returned to the eastern U.S. in the form of the Rocky Mountain elk, introduced to the region in the 20th century. Description A full-grown bull could weigh up to 1,000 pounds, stand 50-60 inches tall at the shoulder, and carry a rack of antlers six feet in length. History At the start of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rocky Mountain Elk
The Rocky Mountain elk (''Cervus canadensis nelsoni'') is a subspecies of elk found in the Rocky Mountains and adjacent ranges of Western North America. Habitat The winter ranges are most common in open forests and floodplain marshes in the lower elevations. In the summer it migrates to the subalpine forests and alpine basins. Elk have a diverse habitat range that they can reside in but are most often found in forest and forest edge habitat and in mountain regions they often stay in higher elevations during warmer months and migrate down lower in the winter. They may even come down the mountain and leave the forest into some grassland for part of the day but head back into the timber in the evening. Effects of climate change Climate change/warming can keep elk in their higher elevation habitats for longer into the winter than normal. Climate changes such as warming have in some cases even increased the seasonal range of elk in the winter. For example, in Yellowstone the climate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tule Elk
The tule elk (''Cervus canadensis nannodes'') is a subspecies of elk found only in California, ranging from the grasslands and marshlands of the Central Valley to the grassy hills on the coast. The subspecies name derives from the tule (), a species of sedge native to freshwater marshes on which the Tule elk feeds. When the Europeans first arrived, an estimated 500,000 tule elk roamed these regions, but by 1870 they were thought to be extirpated. However, in 1874–1875 a single breeding pair was discovered in the tule marshes of Buena Vista Lake in the southern San Joaquin Valley. Conservation measures were taken to protect the species in the 1970s. Today, the wild population exceeds 4,000. Tule elk can reliably be found in Carrizo Plain National Monument, Point Reyes National Seashore, portions of the Owens Valley from Lone Pine to Bishop, on Coyote Ridge in Santa Clara Valley, San Jose, California and in Pacheco State Park and areas surrounding San Luis Reservoir near Los ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellowstone National Park
Yellowstone National Park is an American national park located in the western United States, largely in the northwest corner of Wyoming and extending into Montana and Idaho. It was established by the 42nd U.S. Congress with the Yellowstone National Park Protection Act and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in the world. The park is known for its wildlife and its many geothermal features, especially the Old Faithful geyser, one of its most popular. While it represents many types of biomes, the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion. While Native Americans have lived in the Yellowstone region for at least 11,000 years, aside from visits by mountain men during the early-to-mid-19th century, organized exploration did not begin until the late 1860s. Management and control of the park ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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