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73-530: Mount Meeker is the second highest summit in Rocky Mountain National Park after its neighbor Longs Peak , 0.7 miles (1.1 km) to the northwest. Due to its location southeast of Longs Peak, Mount Meeker is more visually prominent along much of the northern Front Range Urban Corridor . The peak is considered more difficult to climb, technically, than Longs Peak on certain routes. Neniis-otoyou’u , or nesótaieux , ("two guides")

146-399: A generalist diet. During the spring and summer, they mainly feed on herbaceous plant material such as leaves, roots, herbs, ferns, grasses, sedges , water lilies , water shields , rushes , and cattails . During the fall and winter, they eat more bark and cambium of woody plants; tree and shrub species consumed include aspen , birch , oak , dogwood , willow and alder . There

219-471: A gradient (steepness) of one percent, though they have been recorded using streams with gradients as high as 15 percent. Beavers are found in wider streams more often than in narrower ones. They also prefer areas with no regular flooding and may abandon a location for years after a significant flood. Beavers typically select flat landscapes with diverse vegetation close to the water. North American beavers prefer trees being 60 m (200 ft) or less from

292-415: A hypothalamus that is much smaller than the cerebrum ; this indicates a relatively advanced brain with higher intelligence. The cerebellum is large, allowing the animal to move within a three-dimensional space (such as underwater) similar to tree-climbing squirrels. The neocortex is devoted mainly to touch and hearing. Touch is more advanced in the lips and hands than the whiskers and tail. Vision in

365-662: A semiaquatic lifestyle. Members of the subfamily Castoroidinae are considered to be a sister group to modern beavers, and included giants like Castoroides of North America and Trogontherium of Eurasia. Castoroides is estimated to have had a length of 1.9–2.2 m (6.2–7.2 ft) and a weight of 90–125 kg (198–276 lb). Fossils of one genus in Castoroidinae, Dipoides , have been found near piles of chewed wood, though Dipoides appears to have been an inferior woodcutter compared to Castor . Researchers suggest that modern beavers and Castoroidinae shared

438-447: A "prohibited new organism" preventing them from being introduced into the country. Beavers live in freshwater ecosystems such as rivers, streams, lakes and ponds. Water is the most important component of beaver habitat; they swim and dive in it, and it provides them refuge from land predators. It also restricts access to their homes and allows them to move building objects more easily. Beavers prefer slower moving streams, typically with

511-400: A "raft"; when the top becomes frozen, it creates a "cap". The beaver accesses the raft by swimming under the ice. Many populations of Eurasian beaver do not make rafts, but forage on land during winter. Beavers usually live up to 10 years. Felids , canids , and bears may prey upon them. Beavers are protected from predators when in their lodges, and prefer to stay near water. Parasites of

584-541: A bark-eating common ancestor . Dam and lodge-building likely developed from bark-eating, and allowed beavers to survive in the harsh winters of the subarctic . There is no conclusive evidence for this behavior occurring in non- Castor species. The genus Castor likely originated in Eurasia . The earliest fossil remains appear to be C. neglectus , found in Germany and dated 12–10 mya. Mitochondrial DNA studies place

657-466: A conical, muscular, hairy base; the remaining two-thirds of the appendage is flat and scaly. The tail has multiple functions: it provides support for the animal when it is upright (such as when chewing down a tree), acts as a rudder when it is swimming, and stores fat for winter. It also has a countercurrent blood vessel system which allows the animal to lose heat in warm temperatures and retain heat in cold temperatures. The beaver's sex organs are inside

730-495: A cut diamond seen from the side and inverted). Another famous profile belongs to Longs Peak: to the southeast of the summit is a series of rises which, when viewed from the northeast, resembles a beaver . Lumena Wortman Buhl was the first woman to summit the east face of the mountain.( https://en.wikipedia.org/wiki/Carl_Blaurock ) In 1954 the first proposal made to the National Park Service to climb The Diamond

803-674: A dam, beavers stack up relatively long and thick logs between banks and in opposite directions. Heavy rocks keep them stable, and grass is packed between them. Beavers continue to pile on more material until the dam slopes in a direction facing upstream. Dams can range in height from 20 cm (7.9 in) to 3 m (9.8 ft) and can stretch from 0.3 m (1 ft 0 in) to several hundred meters long. Beaver dams are more effective in trapping and slowly leaking water than man-made concrete dams. Lake-dwelling beavers do not need to build dams. Beavers make two types of lodges: bank lodges and open-water lodges. Bank lodges are burrows dug along

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876-1010: A height of 2 m (6 ft 7 in) and an above-water diameter of 6 m (20 ft). A lodge sturdy enough to withstand the coming winter can be finished in just two nights. Both lodge types can be present at a beaver site. During the summer, beavers tend to use bank lodges to keep cool. They use open-water lodges during the winter. The air vent provides ventilation, and newly added carbon dioxide can be cleared in an hour. The lodge remains consistent in oxygen and carbon dioxide levels from season to season. Beavers in some areas will dig canals connected to their ponds. The canals fill with groundwater and give beavers access and easier transport of resources, as well as allow them to escape predators. These canals can stretch up to 1 m (3 ft 3 in) wide, 0.5 m (1 ft 8 in) deep, and over 0.5 km (0.31 mi) long. It has been hypothesized that beavers' canals are not only transportation routes but an extension of their " central place " around

949-468: A liquid substance used mainly for marking territory. Anal glands produce an oily substance which the beaver uses as a waterproof ointment for its coat. The substance plays a role in individual and family recognition. Anal secretions are darker in females than males among Eurasian beavers, while the reverse is true for the North American species. Compared to many other rodents, a beaver's brain has

1022-423: A more grooved palatine (with the opening shifted towards the front), and reduced incisive foramen . Members of the subfamily Palaeocastorinae appeared in late-Oligocene North America. This group consisted primarily of smaller animals with relatively large front legs, a flattened skull, and a reduced tail—all features of a fossorial (burrowing) lifestyle. In the early Miocene (about 24 mya), castorids evolved

1095-463: A number of freshwater habitats , such as rivers, streams, lakes and ponds. They are herbivorous , consuming tree bark , aquatic plants , grasses and sedges . Beavers build dams and lodges using tree branches, vegetation, rocks and mud; they chew down trees for building material. Dams restrict water flow, and lodges serve as shelters. Their infrastructure creates wetlands used by many other species, and because of their effect on other organisms in

1168-460: A pond for them to live in, and for lodges, which act as shelters and refuges from predators and the elements. Without such material, beavers dig burrows into a bank to live. Dam construction begins in late summer or early fall, and they repair them whenever needed. Beavers can cut down trees up to 15 cm (5.9 in) wide in less than 50 minutes. Thicker trees, at 25 cm (9.8 in) wide or more, may not fall for hours. When chewing down

1241-531: A risk of lightning strikes. The most difficult portion of the hike begins at the Boulder Field, 6.4 miles (10 km) into the hike. After scrambling over the boulders, hikers reach the Keyhole at 6.7 miles (10.5 km). The following quarter of a mile involves a scramble along narrow ledges, many of which may have nearly sheer cliffs of 1,000 feet (305 m) or more just off the edge. The next portion of

1314-410: A summit. For hikers who do not wish to climb to the summit, there are less-involved hikes on the peak as well. Peacock Pool and Chasm Lake are popular hiking destinations and follow well-maintained trails. It is also rewarding to hike just to the Boulder Field, the Keyhole, or the seldom-visited Chasm View—the ridge between Mount Lady Washington and the east face of Longs Peak. Camping is available at

1387-400: A thick enamel that is colored orange or reddish-brown by iron compounds. The lower incisors have roots that are almost as long as the entire lower jaw. Beavers have one premolar and three molars on all four sides of the jaws, adding up to 20 teeth. The molars have meandering ridges for grinding woody material. The eyes, ears and nostrils are arranged so that they can remain above water while

1460-423: A tree, beavers switch between biting with the left and right side of the mouth. Tree branches are then cut and carried to their destination with the powerful jaw and neck muscles. Other building materials, like mud and rocks, are held by the forelimbs and tucked between the chin and chest. Beavers start building dams when they hear running water, and the sound of a leak in a dam triggers them to repair it. To build

1533-625: Is a stub . You can help Misplaced Pages by expanding it . Longs Peak Longs Peak is a mountain in the northern Front Range of the Rocky Mountains of North America. The 14,256-foot (4345.22 m) fourteener is located in the Rocky Mountain National Park Wilderness , 9.6 miles (15.5 km) southwest by south ( bearing 209°) of the Town of Estes Park , Colorado , United States . Longs Peak

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1606-505: Is directed more towards the brain. A beaver's body also has a high tolerance for carbon dioxide. When surfacing, the animal can replace 75 percent of the air in its lungs in one breath, compared to 15 percent for a human. The IUCN Red List of mammals lists both beaver species as least concern . The North American beaver is widespread throughout most of the United States and Canada and can be found in northern Mexico. The species

1679-476: Is fairly exposed to the elements and requires an ascent of 3300ft over 6.4 miles with an overnight pack. Fifty-nine people have died climbing or hiking Longs Peak. According to the National Park Service, two people, on average, die every year attempting to climb the mountain. Less experienced mountaineers are encouraged to use a guide for this summit to mitigate risk and increase the probability of

1752-402: Is some disagreement about why beavers select specific woody plants; some research has shown that beavers more frequently select species which are more easily digested, while others suggest beavers principally forage based on stem size. Beavers may cache their food for the winter, piling wood in the deepest part of their pond where it cannot be reached by other browsers . This cache is known as

1825-663: Is the family, which is composed of an adult male and an adult female in a monogamous pair and their offspring. Beaver families can have as many as ten members; groups about this size require multiple lodges. Mutual grooming and play fighting maintain bonds between family members, and aggression between them is uncommon. Adult beavers mate with their partners, though partner replacement appears to be common. A beaver that loses its partner will wait for another one to come by. Estrus cycles begin in late December and peak in mid-January. Females may have two to four estrus cycles per season, each lasting 12–24 hours. The pair typically mate in

1898-654: Is the northernmost fourteener in the Rocky Mountains of Colorado and the highest point in Boulder County and Rocky Mountain National Park . The mountain was named in honor of explorer Stephen Harriman Long and is featured on the Colorado state quarter. Longs Peak can be seen behind Mt. Meeker from Longmont, Colorado and more directly from Loveland, Colorado , as well as from most of

1971-493: Is the source for several European placenames , including those of Beverley , Bièvres , Biberbach , Biebrich , Bibra , Bibern , Bibrka , Bobr , Bober , Bóbrka , Bjurholm , Bjurälven , and Bjurum . The genus name Castor has its origin in the Greek word κάστωρ kastōr and translates as ' beaver ' . Carl Linnaeus coined the genus name Castor in 1758 as well as the specific (species) epithet fiber for

2044-572: Is what the Arapaho people called both Longs Peak and Mount Meeker. Les Deux Oreilles ("two ears") is what a couple of French trappers called Longs Peak and Mount Meeker in 1799. The name "Mount Meeker" was first suggested in 1873 when the Hayden Survey was performed. Present were William Byers , Anna Dickinson , and Ralph Meeker, the son of Nathan Meeker . It was officially named this in 1911. This Colorado state location article

2117-666: The IUCN Red List of mammals. In human culture, the beaver symbolizes industriousness, especially in connection with construction; it is the national animal of Canada. The English word beaver comes from the Old English word beofor or befor and is connected to the German word biber and the Dutch word bever . The ultimate origin of the word is an Indo-European root for ' brown ' . Cognates of beaver

2190-812: The North American beaver ( Castor canadensis ) and the Eurasian beaver ( C. fiber ). The Eurasian beaver is slightly longer and has a more lengthened skull, triangular nasal cavities (as opposed to the square ones of the North American species), a lighter fur color, and a narrower tail. Agnotocastor coloradensis Agnotocastor praetereadens Anchitheriomys sp. [REDACTED] Castorinae (modern beavers) [REDACTED] Castoroidinae [REDACTED] Agnotocastor sp. Migmacastor procumbodens Palaeocastorinae [REDACTED] Heteromyidae (kangaroo rats and allies) [REDACTED] Geomyidae (gophers) [REDACTED] Beavers belong to

2263-646: The Scandinavian Peninsula . Beginning in 2009, beavers have been successfully reintroduced to parts of Great Britain. In 2020 , the total Eurasian beaver population in Europe was estimated at over one million. Small native populations are also present in Mongolia and northwestern China; their numbers were estimated at 150 and 700, respectively, as of 2016 . Under New Zealand's Hazardous Substances and New Organisms Act 1996 , beavers are classed as

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2336-401: The ecosystem , beavers are considered a keystone species . Adult males and females live in monogamous pairs with their offspring. After their first year, the young help their parents repair dams and lodges; older siblings may also help raise newly born offspring. Beavers hold territories and mark them using scent mounds made of mud, debris, and castoreum —a liquid substance excreted through

2409-1039: The riparian zone associated with beaver dams has been shown to increase the abundance and diversity of birds favoring the water's edge, an impact that may be especially important in semi-arid climates . Fish-eating birds use beaver ponds for foraging, and in some areas, certain species appear more frequently at sites where beavers were active than at sites with no beaver activity. In a study of Wyoming streams and rivers, watercourses with beavers had 75 times as many ducks as those without. As trees are drowned by rising beaver impoundments, they become an ideal habitat for woodpeckers , which carve cavities that may be later used by other bird species. Beaver-caused ice thawing in northern latitudes allows Canada geese to nest earlier. Other semi-aquatic mammals, such as water voles , muskrats , minks , and otters , will shelter in beaver lodges. Beaver modifications to streams in Poland create habitats favorable to bat species that forage at

2482-588: The Boulder Field and also on the lower portions of the mountain, such as Goblin's Forest next to the stream at the bottom. Technical climbers, with the correct permit, are allowed to use sites at the base of the East Face and at Chasm View. It is also possible to camp to the south of the mountain at Sand Beach Lake. In addition to the standard "Keyhole" route, there are more serious and more technical climbs on Longs Peak. Climbers should seek qualified instruction; deaths on Longs Peak are an annual occurrence. Some of

2555-701: The East Longs Peak Trail, the Longs Peak Trail, the Keyhole Route, Clark's Arrow and the Shelf Trail . Only some technical climbing is required to reach the summit of Longs Peak during the summer season, which typically runs from mid July through early September. Outside of this window the popular "Keyhole" route is still open; however, its rating is upgraded to all "technical" as treacherous ice formation and snow fall necessitates

2628-598: The Eurasian species. German zoologist Heinrich Kuhl coined C. canadensis in 1820, many scientists considered both names synonymous for one same species until the 1970s, when chromosomal evidence became available confirming both as separate where the Eurasian has 48 chromosomes, while the North American has 40.) The difference in chromosome numbers prevents them from interbreeding. Twenty-five subspecies have been classified for C. canadensis , and nine have been classified for C. fiber . There are two extant species:

2701-779: The Rockies in "A Lady's Life in the Rocky Mountains". Beaver Beavers (genus Castor ) are large, semiaquatic rodents of the Northern Hemisphere . There are two existing species : the North American beaver ( Castor canadensis ) and the Eurasian beaver ( C. fiber ). Beavers are the second-largest living rodents, after capybaras , weighing up to 50 kg (110 lb). They have stout bodies with large heads, long chisel-like incisors , brown or gray fur , hand-like front feet, webbed back feet, and tails that are flat and scaly. The two species differ in skull and tail shape and fur color. Beavers can be found in

2774-488: The animal warm, to help it float in water, and to protect it against predators. Guard hairs are 5–6 cm (2.0–2.4 in) long and typically reddish brown, but can range from yellowish brown to nearly black. The underfur is 2–3 cm (0.79–1.18 in) long and dark gray. Beavers molt every summer. Beavers have large skulls with powerful chewing muscles . They have four chisel-shaped incisors that continue to grow throughout their lives. The incisors are covered in

2847-558: The average size of these fishes. These species use beaver habitats for spawning, overwintering, feeding, and as havens from changes in water flow. The positive effects of beaver dams on fish appear to outweigh the negative effects, such as blocking of migration. Beaver ponds have been shown to be beneficial to frog populations by protecting areas for larvae to mature in warm water. The stable waters of beaver ponds also provide ideal habitat for freshwater turtles . Beavers help waterfowl by creating increased areas of water. The widening of

2920-415: The beaver include the bacteria Francisella tularensis , which causes tularemia ; the protozoan Giardia duodenalis , which causes giardiasis (beaver fever); and the beaver beetle and mites of the genus Schizocarpus . They have also been recorded to be infected with the rabies virus . Beavers need trees and shrubs to use as building material for dams , which restrict flowing water to create

2993-571: The beaver is relatively poor; the beaver eye cannot see as well underwater as an otter . Beavers have a good sense of smell, which they use for detecting land predators and for inspecting scent marks, food, and other individuals. Beavers can hold their breath for as long as 15 minutes but typically remain underwater for no more than five or six minutes. Dives typically last less than 30 seconds and are usually no more than 1 m (3 ft 3 in) deep. When diving, their heart rate decreases to 60 beats per minute, half its normal pace, and blood flow

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3066-453: The beaver population on the continent to rebound to an estimated 6–12   million by the late 20th century; still far lower than the originally estimated 60–400   million North American beavers before the fur trade. The introduced population in Tierra del Fuego is estimated at 35,000–50,000 individuals as of 2016 . The Eurasian beaver's range historically included much of Eurasia, but

3139-571: The beaver's urethra -based castor sacs. Beavers can also recognize their kin by their anal gland secretions and are more likely to tolerate them as neighbors. Historically, beavers have been hunted for their fur, meat, and castoreum. Castoreum has been used in medicine, perfume, and food flavoring; beaver pelts have been a major driver of the fur trade . Before protections began in the 19th and early 20th centuries, overhunting had nearly exterminated both species. Their populations have since rebounded, and they are listed as species of least concern by

3212-442: The body, and the male's penis has a cartilaginous baculum . They have only one opening, a cloaca , which is used for reproduction, scent-marking, defecation, and urination. The cloaca evolved secondarily, as most mammals have lost this feature, and may reduce the area vulnerable to infection in dirty water. The beaver's intestine is six times longer than its body, and the caecum is double the volume of its stomach. Microorganisms in

3285-404: The caecum allow them to process around 30 percent of the cellulose they eat. A beaver defecates in the water, leaving behind balls of sawdust. Female beavers have four mammary glands ; these produce milk with 19 percent fat, a higher fat content than other rodents. Beavers have two pairs of glands: castor sacs, which are part of the urethra, and anal glands . The castor sacs secrete castoreum ,

3358-545: The common ancestor of the two living species at around 8 mya. The ancestors of the North American beaver would have crossed the Bering Land Bridge around 7.5 mya. Castor may have competed with members of Castoroidinae, which led to niche differentiation . The fossil species C. praefiber was likely an ancestor of the Eurasian beaver. C. californicus from the Early Pleistocene of North America

3431-431: The constantly changing water levels, leading to greater carbon storage . Beaver ponds, and the wetlands that succeed them, remove sediments and pollutants from waterways, and can stop the loss of important soils. These ponds can increase the productivity of freshwater ecosystems by accumulating nitrogen in sediments. Beaver activity can affect the temperature of the water; in northern latitudes, ice thaws earlier in

3504-628: The hike includes climbing over 600 vertical feet (183 m) up the Trough before reaching the most exposed section of the hike, the Narrows. Just beyond the Narrows, the Notch signifies the beginning of the Homestretch, a steep climb to the football field-sized, flat summit. It is possible to camp out overnight in the Boulder Field (permit required) which makes for a less arduous two-day hike. However, this

3577-832: The indigenous forest. Unlike trees in North America, many trees in South America cannot grow back after being cut down. Beaver activity impacts communities of aquatic invertebrates . Damming typically leads to an increase of slow or motionless water species, like dragonflies , oligochaetes , snails , and mussels . This is to the detriment of rapid water species like black flies , stoneflies , and net-spinning caddisflies . Beaver floodings create more dead trees, providing more habitat for terrestrial invertebrates like Drosophila flies and bark beetles , which live and breed in dead wood. The presence of beavers can increase wild salmon and trout populations, and

3650-435: The lodge and/or food cache. As they drag wood across the land, beavers leave behind trails or "slides", which they reuse when moving new material. The beaver works as an ecosystem engineer and keystone species , as its activities can have a great impact on the landscape and biodiversity of an area. Aside from humans, few other extant animals appear to do more to shape their environment. When building dams, beavers alter

3723-760: The more common routes are, in approximate order of popularity, Longs Peak is described in Jules Verne's From the Earth to the Moon as the location of a 16 feet (192-inch) reflecting telescope called "the Telescope of the Rocky Mountains", built for the purpose of tracking the Columbiad projectile on her flight to the Moon. Englishwoman Isabella Bird extensively describes her joy of visiting Estes Park and climbing Longs Peak during her 1872 solo trip from San Francisco to

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3796-428: The most popular route up the wall. Clark's Arrow (4th-class) is a climb to the summit of Longs named after John Michael Clark, who was a park ranger in Rocky Mountain National Park in the 1950s. The oldest person to summit Longs Peak was Rev. William "Col. Billy" Butler, who climbed it on September 2, 1926, his 85th birthday. In 1932, Clerin "Zumie" Zumwalt summited Longs Peak 53 times. The record number of ascents to

3869-560: The northern Front Range Urban Corridor . It is one of the most prominent mountains in Colorado, rising 9,000 feet (2,700 m) above the western edge of the Great Plains . The peak is named for Major Stephen Harriman Long , who is said to have been the first to spot the Front Range on June 30, 1820, during an expedition on behalf of the U.S. government . Together with nearby Mount Meeker , with an elevation of 13,911 feet,

3942-466: The paths of streams and rivers, allowing for the creation of extensive wetland habitats. In one study, beavers were associated with large increases in open-water areas. When beavers returned to an area, 160% more open water was available during droughts than in previous years, when they were absent. Beaver dams also lead to higher water tables in mineral soil environments and in wetlands such as peatlands . In peatlands particularly, their dams stabilize

4015-404: The presence of a third set of premolars (P3), a hole in the stapes of the inner ear, a smooth palatine bone (with the palatine opening closer to the rear end of the bone), and a longer snout . More derived castorids have less complex occlusion, upper tooth rows that create a V-shape towards the back, larger second premolars compared to molars, absence of a third premolar set and stapes hole,

4088-651: The rest of the body is submerged. The nostrils and ears have valves that close underwater, while nictitating membranes cover the eyes. To protect the larynx and trachea from water flow, the epiglottis is contained within the nasal cavity instead of the throat. In addition, the back of the tongue can rise and create a waterproof seal. A beaver's lips can close behind the incisors, preventing water from entering their mouths as they cut and bite onto things while submerged. The beaver's front feet are dexterous, allowing them to grasp and manipulate objects and food, as well as dig. The hind feet are larger and have webbing between

4161-775: The rodent suborder Castorimorpha , along with Heteromyidae ( kangaroo rats and kangaroo mice ), and the gophers . Modern beavers are the only extant members of the family Castoridae . They originated in North America in the late Eocene and colonized Eurasia via the Bering Land Bridge in the early Oligocene , coinciding with the Grande Coupure , a time of significant changes in animal species around 33   million years ago ( myr ). The more basal castorids had several unique features: more complex occlusion between cheek teeth, parallel rows of upper teeth, premolars that were only slightly smaller than molars,

4234-677: The shore and covered in sticks. The more complex freestanding, open-water lodges are built over a platform of piled-up sticks. The lodge is mostly sealed with mud, except for a hole at the top which acts as an air vent. Both types are accessed by underwater entrances. The above-water space inside the lodge is known as the "living chamber", and a "dining area" may exist close to the water entrance. Families routinely clean out old plant material and bring in new material. North American beavers build more open-water lodges than Eurasian beavers. Beaver lodges built by new settlers are typically small and sloppy. More experienced families can build structures with

4307-436: The summit of Longs Peak is 428, by Jim Detterline . Jim was a rescue Ranger in Rocky Mountain National Park. On October 23, 2016, he died in an accident while solo climbing. Jim rescued over 1,000 people in the mountains of Rocky Mountain National Park and he received the U.S. Interior Department's Valor Award. He also earned the title "Mr. Longs Peak". On June 6, 2016, a group of US Special Forces were rescued after members of

4380-467: The team suffered from altitude sickness. Longs Peak has one remaining glacier named Mills Glacier . The glacier is located around 12,800 feet (3,900 m) at the base of the Eastern Face, just above Chasm Lake. A permanent snowfield, called The Dove , is located north of Longs Peak. Longs Peak is one of fewer than 50 mountains in Colorado that have a glacier. Trails that ascend Longs Peak include

4453-496: The toes , and the second innermost toe has a "double nail" used for grooming. Beavers can swim at 8 km/h (5.0 mph); only their webbed hind feet are used to swim, while the front feet fold under the chest. On the surface, the hind limbs thrust one after the other; while underwater, they move at the same time. Beavers are awkward on land but can move quickly when they feel threatened. They can carry objects while walking on their hind legs. The beaver's distinctive tail has

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4526-630: The two mountains are sometimes referred to as the Twin Peaks (not to be confused with a nearby lower mountain called Twin Sisters ). As the only fourteener in Rocky Mountain National Park , the peak has long been of interest to climbers . The easiest route is not "technical" during the summer season. It was probably first used by pre-Columbian indigenous people collecting eagle feathers. The first recorded ascent

4599-437: The use of specialized climbing equipment including, at a minimum, crampons and an ice axe . It is one of the most difficult Class 3 fourteener scrambles in Colorado. The hike from the trailhead to the summit is 8.4 miles (13.5 km) each way, with a total elevation gain of 4,875 feet. Most hikers begin before dawn in order to reach the summit and return below the tree line before frequent afternoon thunderstorms bring

4672-518: The warmer beaver-dammed waters. Beavers may contribute to climate change . In Arctic areas, the floods they create can cause permafrost to thaw, releasing methane into the atmosphere . As wetlands are formed and riparian habitats are enlarged, aquatic plants colonize the newly available watery habitat. One study in the Adirondacks found that beaver engineering lead to an increase of more than 33 percent in herbaceous plant diversity along

4745-420: The water and to a lesser extent in the lodge, for half a minute to three minutes. Up to four young, or kits, are born in spring and summer, after a three or four-month gestation . Newborn beavers are precocial with a full fur coat, and can open their eyes within days of birth. Their mother is the primary caretaker, while their father maintains the territory. Older siblings from a previous litter also play

4818-548: The water surface and "prefer moderate vegetation clutter". Large herbivores, such as some deer species, benefit from beaver activity as they can access vegetation from fallen trees and ponds. Beavers are mainly nocturnal and crepuscular , and spend the daytime in their shelters. In northern latitudes, beaver activity is decoupled from the 24-hour cycle during the winter, and may last as long as 29 hours. They do not hibernate during winter, and spend much of their time in their lodges. The core of beaver social organization

4891-524: The water's edge. Another study in semiarid eastern Oregon found that the width of riparian vegetation on stream banks increased several-fold as beaver dams watered previously dry terraces adjacent to the stream. Riparian ecosystems in arid areas appear to sustain more plant life when beaver dams are present. Beaver ponds act as a refuge for riverbank plants during wildfires , and provide them with enough moisture to resist such fires. Introduced beavers at Tierra del Fuego have been responsible for destroying

4964-546: The water, but will roam several hundred meters to find more. Beavers have also been recorded in mountainous areas. Dispersing beavers will use certain habitats temporarily before finding their ideal home. These include small streams, temporary swamps, ditches, and backyards. These sites lack important resources, so the animals do not stay there permanently. Beavers have increasingly settled at or near human-made environments, including agricultural areas, suburbs , golf courses , and shopping malls. Beavers have an herbivorous and

5037-861: Was decimated by hunting by the early 20th century. In Europe, beavers were reduced to fragmented populations, with combined population numbers being estimated at 1,200 individuals for the Rhône of France, the Elbe in Germany, southern Norway, the Neman river and Dnieper Basin in Belarus, and the Voronezh river in Russia. The beaver has since recolonized parts of its former range, aided by conservation policies and reintroductions . Beaver populations now range across western, central, and eastern Europe, and western Russia and

5110-456: Was introduced to Finland in 1937 (and then spread to northwestern Russia) and to Tierra del Fuego, Patagonia , in 1946. As of 2019 , the introduced population of North American beavers in Finland has been moving closer to the habitat of the Eurasian beaver. Historically, the North American beaver was trapped and nearly extirpated because its fur was highly sought after. Protections have allowed

5183-553: Was met with an official closure, a stance not changed until 1960. The Diamond was first ascended by Dave Rearick and Bob Kamps that year, by a route that would come to be known simply as D1 . This route would later be listed in Allen Steck and Steve Roper's influential book Fifty Classic Climbs of North America . The easiest route on the face is the Casual Route (5.10a), first climbed in 1977. It has since become

5256-540: Was on August 23, 1868 by the surveying party of John Wesley Powell via the south side. Addie Alexander was the first woman to summit Longs Peak in 1871. Isabella L Bird also recounts an ascent in the 1870s in one of her letters (A Lady’s Life in the Rocky Mountains) The East Face of the mountain is 1,675 feet, steep, and surmounted by a 1,000 feet steep sheer cliff known as " The Diamond " (so-named because of its shape, approximately that of

5329-651: Was similar to but larger than the extant North American beaver. ' Beavers are the second-largest living rodents, after capybaras . They have a head–body length of 80–120 cm (31–47 in), with a 25–50 cm (9.8–19.7 in) tail, a shoulder height of 30–60 cm (12–24 in), and generally weigh 11–30 kg (24–66 lb), but can be as heavy as 50 kg (110 lb). Males and females are almost identical externally. Their bodies are streamlined like marine mammals and their robust build allows them to pull heavy loads. A beaver coat has 12,000–23,000 hairs/cm (77,000–148,000 hairs/in ) and functions to keep

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