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88-596: The Ruby Mountains ( Shoshoni : 'Duka Doya', meaning “Snowcapped”) are a mountain range , primarily located within Elko County with a small extension into White Pine County , in Nevada , United States . Most of the range is included within the Humboldt-Toiyabe National Forest . The range reaches a maximum elevation of 11,387 feet (3,471 m) on the summit of Ruby Dome . To the north

176-399: 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

264-471: 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

352-415: 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

440-662: 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

528-447: 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

616-400: 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

704-541: 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

792-466: 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

880-674: 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

968-583: A group of canyons above the Te-Moak tribal lands constitute the headwaters of the South Fork of the Humboldt River. Major summits in the central core of the range include Ruby Dome , Thomas Peak , Liberty Peak , Mount Fitzgerald , Verdi Peak , Snow Lake Peak , Mount Silliman, and Mount Gilbert . Prominent peaks further south include King , Lake , Wines, Tipton , and Pearl Peaks. North of

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1056-1010: 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

1144-468: 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

1232-423: 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

1320-463: 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

1408-460: 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

1496-400: 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

1584-423: 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

1672-408: A typical Numic vowel inventory of five vowels. In addition, there is the common diphthong /ai/ , which functions as a simple vowel and varies rather freely with [e] ; however, certain morphemes always contain [ai] and others always contain [e] . All vowels occur as short or long, but [aiː] / [eː] is rare. Shoshoni has a typical Numic consonant inventory. Shoshoni syllables are of

1760-483: A word; however, primary stress tends to fall on the second syllable if that syllable is long. For instance, natsattamahkantɨn [ˈnazattamaxandɨ] "tied up" bears primary stress on the first syllable; however, kottoohkwa [kotˈtoːxˌwa] "made a fire" bears primary stress on the second syllable, with long vowel [oː] , instead of the first syllable with short vowel [o] . As in other Numic languages, stress in Shoshoni

1848-652: Is Secret Pass and the East Humboldt Range , and from there the Rubies run south-southwest for about 80 miles (130 km). To the east lies Ruby Valley , and to the west lie Huntington and Lamoille Valleys. The Ruby Mountains are the only range of an introduced bird, the Himalayan snowcock , in North America. The mountain range was named after the garnets found by early explorers. The central core of

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1936-406: Is a primarily suffixing language. Many nouns in Shoshoni have an absolutive suffix (unrelated to the absolutive case ). The absolutive suffix is normally dropped when the noun is the first element in a compound, when the noun is followed by a suffix or postposition, or when the noun is incorporated into a verb. For instance, the independent noun sɨhɨpin "willow" has the absolutive suffix -pin ;

2024-438: Is commonly marked through reduplication of the first syllable of the verb stem, so that singular kimma "come" becomes kikimma in the dual (and remains kima in the plural). A suppletive form is often used for the dual or plural forms of the verb; for instance, singular yaa "carry" becomes hima in both the dual and plural. Suppletion and reduplication frequently work in tandem to express number: singular nukki "run" becomes

2112-505: 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

2200-423: Is distributed based on mora-counting. Short Shoshoni vowels have one mora, while long vowels and vowel clusters ending in [a] have two morae. Following the primary stress, every other mora receives secondary stress. If stress falls on the second mora in a long vowel, the stress is transferred to the first mora in the long vowel and mora counting continues from there. For example, natsattamahkantɨn "tied up" bears

2288-420: Is marked by suffixes on all human nouns and optionally on other animate nouns. The regular suffixes for number are listed in the table below. The Shoshoni singular is unmarked. Case is also marked by suffixes, which vary depending on the noun. Subjective case is unmarked. Many nouns also have a zero objective case marker; other possible objective markers are -tta , -a , and -i . These suffixes correspond with

2376-421: Is relatively free but shows a preference toward SOV order. The endonyms newe ta̲i̲kwappe and Sosoni' ta̲i̲kwappe mean "the people's language" and "the Shoshoni language," respectively. Shoshoni is classified as threatened, although attempts at revitalization are underway. Shoshoni is the northernmost member of the large Uto-Aztecan language family, which includes nearly sixty living languages, spoken in

2464-402: 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

2552-663: 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

2640-493: 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

2728-412: Is the typical word order for Shoshoni. nɨ I hunanna badger puinnu see nɨ hunanna puinnu I badger see "I saw a badger" nɨwɨ person sakkuhtɨn there paittsɨkkinna was hollering nɨwɨ sakkuhtɨn paittsɨkkinna person there {was hollering} "the person was making a fuss there" In ditransitive sentences, the direct and indirect object are marked with

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2816-523: Is used with verb stems to form nouns used for the purpose of the verb: katɨnnompɨh "chair" is derived from katɨ "sit"; puinompɨh "binoculars" is derived from pui "see". The characterization suffix -kantɨn be used with a root noun to derive a noun characterized by the root: hupiakantɨn "singer" is derived from hupia "song"; puhakantɨn "shaman" is derived from puha "power", as one characterized by power. Shoshoni verbs may mark for number, mainly through reduplication or suppletion . The dual

2904-545: The Bible were translated in 1986. As of 2012, Idaho State University offers elementary, intermediate, and conversational Shoshoni language classes, in a 20-year project to preserve the language. Open-source Shosoni audio is available online to complement classroom instruction, as part of the university's long-standing Shoshoni Language Project. The Shoshone-Bannock Tribe teaches Shoshoni to its children and adults as part of its Language and Culture Preservation Program. On

2992-666: 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

3080-552: The North American Plate . Normal faults on the eastern and western flanks of the range separate it from the basins on either side of it. The Ruby Mountains are an example of a metamorphic core complex that formed during the Cretaceous-Paleogene time when the oceanic Farallon Plate was subducting underneath the North American plate causing crustal thickening throughout Nevada and Utah. The weight from

3168-812: 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

3256-581: 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

3344-646: 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

3432-853: The Wind River Reservation in Wyoming, elders have been active in digital language archiving. Shoshoni is taught using Dr. Steven Greymorning's Accelerated Second Language Acquisition techniques. A summer program known as the Shoshone/Goshute Youth Language Apprenticeship Program (SYLAP), held at the University of Utah 's Center for American Indian Languages since 2009, has been featured on NPR 's Weekend Edition . Shoshoni youth serve as interns, assisting with digitization of Shoshoni language recordings and documentation from

3520-401: 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

3608-1039: 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

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3696-949: The Central Numic languages Timbisha and Comanche . Timbisha, or Panamint, is spoken in southeastern California by members of the Timbisha Shoshone Tribe , but it is considered a distinct language from Shoshoni. The Comanche split from the Shoshone around 1700, and consonant changes over the past few centuries have limited mutual intelligibility of Comanche and Shoshoni. Principal dialects of Shoshoni are Western Shoshoni in Nevada, Gosiute in western Utah, Northern Shoshoni in southern Idaho and northern Utah, and Eastern Shoshoni in Wyoming. The main differences between these dialects are phonological. The number of people who speak Shoshoni has been steadily dwindling since

3784-598: 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:

3872-674: The Western United States down through Mexico and into El Salvador . Shoshoni belongs to the Numic subbranch of Uto-Aztecan. The word Numic comes from the cognate word in all Numic languages for "person". For example, in Shoshoni the word is neme [nɨw̃ɨ] or, depending on the dialect, newe [nɨwɨ] , in Timbisha it is nümü [nɨwɨ] , and in Southern Paiute, nuwuvi [nuwuβi] . Shoshoni's closest relatives are

3960-608: The Wick R. Miller collection, in order to make the materials available for tribal members. The program released the first Shoshone language video game in August 2013. In July 2012, Blackfoot High School in Southeastern Idaho announced it would offer Shoshoni language classes. The Chief Tahgee Elementary Academy, a Shoshone-Bannock charter school teaching English and Shoshoni, opened at Fort Hall in 2013. Shoshoni has

4048-488: 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

4136-558: 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

4224-415: 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

4312-571: 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

4400-453: 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

4488-571: 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

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4576-442: 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

4664-404: 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 ,

4752-428: The central core, significant peaks include Old-Man-of-the-Mountain and Soldier Peak. Glaciers gouged out basins that are now alpine lakes. The larger of these, all located in the central core of the range, include Echo , Liberty , Favre , Lamoille , Castle , and Griswold lakes, while smaller tarns also in the central core include the scenic Island , Dollar , Verdi , Snow , Box , and Seitz lakes. Further to

4840-545: 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

4928-431: 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

5016-413: The form (C)V(V)(C). For instance: nɨkka "dance" (CVC CV), ɨkkoi "sleep" (VC CVV), and paa "water" (CVV). Shoshoni does not allow onset clusters. Typical Shoshoni roots are of the form CV(V)CV(V). Examples include kasa "wing" and papi "older brother." Stress in Shoshoni is regular but not distinctive. Primary stress usually falls on the first syllable (more specifically, the first mora ) of

5104-409: The heavy Pleistocene glaciation and still supports a wide variety of flora and fauna. Lower elevations are covered by aspen trees, while higher up the whitebark and limber pines predominate. Mountain goats , bighorn sheep , mule deer, mountain lions , marmots , beaver , and pikas are common residents. A population of Himalayan snowcock was introduced from Pakistan, and is thriving among

5192-496: The high cliffs. Streams, particularly on the western slopes have populations of native Lahontan or Humboldt cutthroat trout , but many of these populations are hybridized with rainbow trout or have been displaced by brown and brook trout , all stocked for angling purposes before impacts on native trout species were well understood. The Ruby Mountains are part of the Basin and Range Province that formed partly due to extension of

5280-769: 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

5368-399: The late 20th century. In the early 21st century, fluent speakers number only several hundred to a few thousand people, while an additional population of about 1,000 know the language to some degree but are not fluent. The Duck Valley and Gosiute communities have established programs to teach the language to their children. Ethnologue lists Shoshoni as "threatened" as it notes that many of

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5456-435: 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

5544-574: The north are Cold , Hidden , Soldier , and Robinson lakes, while to the south are North Furlong and Overland lakes. Water collected by the southern section of the Rubies seeps into the adjacent Ruby Valley to form the Ruby Lake National Wildlife Refuge. The eastern Great Basin is wetter than the western part in the rain shadow of the Sierra Nevada range. Moisture collected by this high range promoted

5632-537: The objective case. The indirect object can occur before the direct object, or vice versa. For example, in nɨ tsuhnippɨha satiia uttuhkwa "I gave the bone to the dog", tsuhnippɨh "bone" and satii "dog" take the objective case suffix -a . The subject is not a mandatory component of a grammatical Shoshoni sentence. Therefore, impersonal sentences without subjects are allowed; those sentences have an object-verb word order. ɨtɨinna Beaver Beavers (genus Castor ) are large, semiaquatic rodents of

5720-466: 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

5808-593: The possessive case markers -n , -ttan or -n , -an , or -n (in Western Shoshoni; this last suffix also appears as -an in Gosiute and is replaced by -in in Northern Shoshoni). These case markers can be predicted only to a degree based on phonology of the noun stem. Nominal derivational morphology is also often achieved through suffixing. For instance, the instrumental suffix -(n)nompɨh

5896-404: 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,

5984-430: The range shows extensive evidence of glaciation during recent ice ages , including U-shaped canyons , moraines , hanging valleys , and steeply carved granite mountains , cliffs , and cirques . Major valleys include Lamoille Canyon (and its branches Thomas and Right Fork Canyons ), Seitz Canyon , Box Canyon and Kleckner Canyon. Canyons to the north drain into the main stem of the Humboldt River above Elko, while

6072-534: The reduplicated nunukki in the dual and the suppleted nutaa in the plural; singular yɨtsɨ "fly" is reduplicated, suppleted dual yoyoti and suppleted plural yoti . Shoshoni uses prefixes to add a specific instrumental element to a verb. For instance, the instrumental prefix to"- "with the hand or fist" can be used with the verb tsima "scrape" to yield tottsima "wipe," as in pɨn puihkatti tottsimma yakaitɨn "he wiped at his eyes, crying". Common instrumental prefixes include: Subject-object-verb (SOV)

6160-651: 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

6248-775: 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,

6336-443: The root loses this suffix in the form sɨhɨykwi "to gather willows". The correlation between any particular noun stem and which of the seven absolutive suffixes it has is irregular and unpredictable. The absolutive suffixes are as follows: Shoshoni is a nominative-accusative language. Shoshoni nouns inflect for three cases ( subjective , objective , and possessive ) and for three numbers (singular, dual, and plural). Number

6424-677: 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

6512-616: The south. The higher altitude sections of the range were designated as the 90,000 acres (36,000 ha) Ruby Mountains Wilderness Area in 1989. The isolated Seitz and Echo Canyons are further preserved as an ecologically special Research Natural Area. The Ruby Crest National Recreation Trail winds from Harrison Pass northward about 40 mi (64 km) to the Road's End Trailhead high in Lamoille Canyon. Principal recreational access can be found at Lamoille and Soldier Canyons on

6600-515: The speakers are 50 and older. UNESCO has classified the Shoshoni language as "severely endangered" in Idaho, Utah, and Wyoming. The language is still being taught to children in a small number of isolated locations. The tribes have a strong interest in language revitalization, but efforts to preserve the language are scattered, with little coordination. However, literacy in Shoshoni is increasing. Shoshoni dictionaries have been published and portions of

6688-594: The stress pattern [ˈnazatˌtamaˌxandɨ] , with stress falling on every other mora. With some dialectical variation, mora counting resets at the border between stems in compound words. Final syllables need not be stressed and may undergo optional final vowel devoicing. Given here are a few examples of regular, well-documented phonological rules in Shoshoni: Shoshoni is a synthetic , agglutinative language, in which words, especially verbs, tend to be complex with several morphemes strung together. Shoshoni

6776-541: The surface as part of the Basin and Range Province along the footwall of a large detachment fault . A mylonitic shear zone can be traced along the fault on the western margin of the Ruby Mountains, marking the contact between the igneous and metamorphic rocks in the core complex and the undeformed sedimentary rocks around it. Generally deeper rocks are exposed in the northern part of the Ruby Mountains than in

6864-483: The thickening crust increased temperatures and pressures up to 40 km at depth and caused regional metamorphism to occur, as well as the formation of some migmatic igneous bodies. During the Oligocene to Eocene, active subduction was no longer occurring and the upper crust relaxed causing the stress to change from compressional to extensional. The extensional force caused the middle and lower crustal rocks to be exhumed to

6952-496: 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

7040-518: 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

7128-420: 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

7216-548: 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

7304-524: 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

7392-546: 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

7480-525: The west side of the range, and at the Overland Lake Trailhead to the east. Shoshoni language The consonant inventory of Shoshoni is rather small, but a much wider range of surface forms of these phonemes appear in the spoken language. The language has six vowels, distinguished by length. Shoshoni is a strongly suffixing language, and it inflects for nominal number and case and for verbal aspect and tense using suffixes. Word order

7568-861: 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

7656-456: 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

7744-651: 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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