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69-545: In addition to being a member of the New York Interschool Association, Brearley is considered a sister school of the all-boys Collegiate School and the nearby all-girls Chapin School , with which it shares an after-school program and some classes. Samuel A. Brearley founded The Brearley School in 1884, and remained the head of school until 1886, when he died of typhoid fever . James G. Croswell

138-399: 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

207-471: 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

276-415: 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

345-662: 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

414-447: 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

483-400: 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

552-401: A 12-story building on 610 East 83rd Street since 1929. The school previously occupied quarters on East 45th Street, West 44th Street, and the corner of Park Avenue and East 61st Street. The building is at full capacity, but in 2015, the school announced that it would not seek an alternative site. Instead, it will renovate the main building and expand into three other buildings. Brearley opened

621-541: 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

690-466: 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

759-674: 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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828-1010: 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

897-468: 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

966-423: 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

1035-572: A new building at 590 East 83rd Street in Fall 2019 to house its lower school program. A separate building, the "Field House" on East 87th Street, has facilities for physical education and athletics including track, soccer , basketball , tennis , badminton , volleyball , lacrosse and field hockey . Brearley also utilizes other sports facilities frequently, such as Randall's Island and Asphalt Green. Brearley fields varsity teams in 13 sports. The school's team colors are red and white, and its mascot

1104-463: 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

1173-460: 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

1242-413: A program of support and guidance led by experienced teachers and administrators. The core of the program is a two-hour evening seminar on Tuesday evenings from late September to mid-March. The purpose of these seminars is to introduce teachers to the independent school community and to the challenges and rewards of the teaching profession. Sessions are held in different schools and presenters are drawn from

1311-400: 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

1380-423: 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

1449-476: A wide pool of veteran teachers who address topics of interest to beginning teachers. In addition, each year the Fellows' group provides a supportive environment for individual members to share and exchange ideas and information. Topics addressed in the Fellows' sessions include: lesson planning, developing curriculum, teaching to different learning styles, partnering with parents, classroom use of technology, meeting

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1518-519: Is a beaver . 40°46′21″N 73°56′44″W  /  40.77250°N 73.94556°W  / 40.77250; -73.94556 New York Interschool The New York Interschool Association Inc., is a consortium of eight independent schools in Manhattan that serves students, teachers, and administration. The Interschool is designed primarily for the coming together of the eight Manhattan private schools to do interschool activities, and also to

1587-505: 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

1656-678: Is offered in Ancient Greek, Latin, French, Spanish, and Mandarin Chinese. Students have access to two computer laboratories — one serving the Lower School, the other the Middle and Upper Schools. In addition, there are three smaller computer workrooms, one for middle schoolers and two for upper schoolers, as well as the science-projects room and laptops for use in the library and classrooms. Students in grades 7 and 8 are given iPads for

1725-402: 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

1794-663: 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

1863-493: 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

1932-666: 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

2001-812: 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

2070-581: 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

2139-646: 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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2208-401: 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

2277-1039: 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

2346-598: 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:

2415-593: The Fellows Program is sponsored by the eight New York independent schools which comprise the Interschool consortium: Brearley, Browning, Chapin, Collegiate, Dalton, Nightingale-Bamford, Spence and Trinity. Any first or second year New York City independent school teacher is eligible to participate in the Fellows Program with his or her schools' approval. The Interschool Fellows Program offers teachers in their first or second year of independent school teaching

2484-488: 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

2553-939: The annual choral festival and the winter peer leadership retreat that allow students to come together with a common purpose. Interschool also facilitates joint courses and academic sharing across its member schools. In addition to programs serving the eight member schools only, there are two major Interschool programs that are open to other interested independent schools in New York City. FDS seeks to recruit and select an outstanding pool of candidates of color for 25 New York City independent schools to consider for their faculty and administrative openings. Openings are for teachers of all grades, both entry-level and experienced. Openings for academic deans and division heads, technologists, librarians, learning specialists, counselors, admissions, and development officers require an advanced degree and two or more years of experience. Established in 1984,

2622-558: 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

2691-415: 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

2760-571: 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

2829-453: 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

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2898-571: 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

2967-442: 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

3036-404: 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 ,

3105-545: 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

3174-431: 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

3243-832: 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

3312-435: 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

3381-559: The nation's top girls' school and the nation's third-best private K-12 school. In the five-year period from 2010 to 2024, Brearley placed 124 students at Ivy League schools. Approximately 60-65 girls graduate from Brearley every year. In the 2024–25 school year, Brearley reported that 56% of its 772 students identified as people of color. In the 2021–22 school year, Brearley reported that of its 768 students, 308 (40.1%) were white, 161 (21.0%) were Asian, 58 (7.6%) were Hispanic, 54 (7.0%) were Black, and 187 (24.3%) were multiracial. The school

3450-489: The needs of a diverse student body, where to seek professional development. One of the highlights of the program is the chance to receive feedback from the program coordinators who observe each Fellow's class at least once a year. The eight member schools. All are located within Manhattan . There are also a number associated schools. All are located within Manhattan unless otherwise noted. Beaver Beavers (genus Castor ) are large, semiaquatic rodents of

3519-466: 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

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3588-404: 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,

3657-651: 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

3726-775: 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,

3795-448: The school year to aid with work in classes and assignments at home. In high school, students are expected to bring their own device, such as a laptop or iPad. The New York Times describes Brearley as "one of the most competitive, academically rigorous private schools in the city." Brearley has been recognized in several lists of schools that send their students to selective universities. In addition, for 2025, Niche ranked Brearley

3864-677: 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

3933-724: The student body in 2024–25) will attend Brearley for free. That year, 75% of financial aid students had household incomes over $ 100,000. The school states that "applying for financial assistance does not impact our determination of your child's admissibility." In August 2024, Brearley's endowment stood at "around $ 160 million." In its Internal Revenue Service filings for the 2022–23 school year, Brearley reported total assets of $ 360.2 million, net assets of $ 275.9 million, investment holdings of $ 181.2 million, and cash holdings of $ 13.4 million. Brearley also reported $ 38.7 million in program service expenses and $ 7.1 million in grants (primarily student financial aid). Brearley has been headquartered on

4002-496: 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

4071-518: 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

4140-420: 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

4209-548: 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

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4278-524: 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

4347-546: 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

4416-641: The widely known Faculty Diverse Search and the Teachers Fellows and posting resumes for one of the member and associated schools. Teachers and professors may apply to any of the member or associated schools through Interschool. Interschool's mission, in 1971, was to provide "school programming" to the single-sex independent schools in Manhattan. From the Interschool's homepage: Joint activities include faculty gatherings to support curriculum development and professional growth, and activities such as

4485-861: 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

4554-456: 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

4623-435: Was not permitted to include students in two or more categories. Tuition for the 2024–25 academic year is $ 64,100. 20% of the student body was on financial aid , and the average grant was approximately $ 58,552, or 91% of tuition. The school stated that it covered 100% of admitted students' demonstrated financial need. In 2024, the school announced that moving forward, students with household incomes at or below $ 100,000 (5% of

4692-651: 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

4761-415: Was the next head until his death in 1915. Since 1926, Brearley has been headed by women, first by Millicent Carey McIntosh . In December 2011, Jane Foley Fried replaced former headmistress Stephanie J. Hull who had resigned for undisclosed reasons. Fried became Brearley's 15th head of school. The school's curriculum is based on the liberal arts . The student-to-faculty ratio is 6:1. Language instruction

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