The Ural (russian: Урал, ), known before 1775 as Yaik (russian: Яик, ba, Яйыҡ, translit=Yayıq, ; kk, Жайық, translit=Jaiyq, ), is a river flowing through

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

and

Kazakhstan Kazakhstan, officially the Republic of Kazakhstan, is a transcontinental country located mainly in Central Asia and partly in Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbeki ...

in the continental border between

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

and

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

. It originates in the southern

Ural Mountains The Ural Mountains ( ; rus, Ура́льские го́ры, r=Uralskiye gory, p=ʊˈralʲskʲɪjə ˈɡorɨ; ba, Урал тауҙары) or simply the Urals, are a mountain range that runs approximately from north to south through western ...

and discharges into the

Caspian Sea The Caspian Sea is the world's largest inland body of water, often described as the world's largest lake or a full-fledged sea. An endorheic basin, it lies between Europe and Asia; east of the Caucasus, west of the broad steppe of Central Asia ...

. At , it is the third-longest river in

after the

Volga The Volga (; russian: Во́лга, a=Ru-Волга.ogg, p=ˈvoɫɡə) is the List of rivers of Europe#Rivers of Europe by length, longest river in Europe. Situated in Russia, it flows through Central Russia to Southern Russia and into the Cas ...

and the

Danube The Danube ( ; ) is a river that was once a long-standing frontier of the Roman Empire and today connects 10 European countries, running through their territories or being a border. Originating in Germany, the Danube flows southeast for , pa ...

, and the 18th-longest river in

. The Ural is conventionally considered part of the boundary between the continents of Europe and Asia. The Ural arises near Mount Kruglaya in the Ural Mountains, flows south parallel and west of the north-flowing

Tobol The Tobol (russian: Тобол, kk, Тобыл ''Tobyl'') is a river in Western Siberia (in Kazakhstan and Russia) and the main (left) tributary of the Irtysh. Its length is , and the area of its drainage basin is . History The Tobol River was ...

, through

Magnitogorsk Magnitogorsk ( rus, Магнитого́рск, p=məɡnʲɪtɐˈɡorsk, ) is an industrial city in Chelyabinsk Oblast, Russia, located on the eastern side of the extreme southern extent of the Ural Mountains by the Ural River. Its population ...

, and around the southern end of the Urals, through

Orsk Orsk (russian: Орск) is the second largest city in Orenburg Oblast, Russia, located on the steppe about southeast of the southern tip of the Ural Mountains. The city straddles the Ural River. Population: It lies adjacent to the Kazakhstan– ...

where it turns west for about , to

Orenburg Orenburg (russian: Оренбу́рг, ), formerly known as Chkalov (1938–1957), is the administrative center of Orenburg Oblast, Russia. It lies on the Ural River, southeast of Moscow. Orenburg is also very close to the Kazakhstan-Russia bor ...

, where the river Sakmara joins. From Orenburg it continues west, passing into Kazakhstan, then turning south again at

Oral The word oral may refer to: Relating to the mouth * Relating to the mouth, the first portion of the alimentary canal that primarily receives food and liquid **Oral administration of medicines ** Oral examination (also known as an oral exam or or ...

, and meandering through a broad flat plain until it reaches the Caspian a few miles below

Atyrau Atyrau ( kk, Атырау, ', ; russian: Атырау, ), known until 1991 as Guryev (russian: Гурьев, ), is a city in Kazakhstan and the capital of Atyrau Region. Atyrau is a transcontinental city, at the mouth of the Ural River on the Cas ...

, where it forms a fine 'digitate' (tree-like)

delta Delta commonly refers to: * Delta (letter) (Δ or δ), a letter of the Greek alphabet * River delta, at a river mouth * D ( NATO phonetic alphabet: "Delta") * Delta Air Lines, US * Delta variant of SARS-CoV-2 that causes COVID-19 Delta may also ...

.Ural River Delta, Kazakhstan
(NASA Earth Observatory)

Geography

The river begins at the slopes of the Kruglaya MountainUral River
Encyclopædia Britannica of the Uraltau mountain ridge in South Ural, on the territory of the

Uchalinsky District Uchalinsky District (russian: Учали́нский райо́н; ba, Учалы районы) is an administrativeConstitution of the Republic of Bashkortostan, Article 64 and municipalLaw #126-z district (raion), one of the fifty-four in ...

Bashkortostan The Republic of Bashkortostan or Bashkortostan ( ba, Башҡортостан Республикаһы, Bashqortostan Respublikahy; russian: Республика Башкортостан, Respublika Bashkortostan),; russian: Респу́блик� ...

. There it has an average width of and flows as a typical mountain river. It then falls into the Yaik Swamp and after exiting it widens up to . Below

Verkhneuralsk Verkhneuralsk (russian: Верхнеура́льск) is a town and the administrative center of Verkhneuralsky District in Chelyabinsk Oblast, Russia, located in the upper streams of the Ural River, southwest of Chelyabinsk, the administrative ...

, its flow is characteristic of a flatland river; there it enters

Chelyabinsk Chelyabinsk ( rus, Челя́бинск, p=tɕɪˈlʲæbʲɪnsk, a=Ru-Chelyabinsk.ogg; ba, Силәбе, ''Siläbe'') is the administrative center and largest city of Chelyabinsk Oblast, Russia. It is the seventh-largest city in Russia, with a ...

and

Orenburg Oblast Orenburg Oblast (russian: Оренбургская область, ''Orenburgskaya oblast'') is a federal subject of Russia (an oblast). Its administrative center is the city of Orenburg. From 1938 to 1957, it bore the name ''Chkalov Oblast'' () ...

s. From

its banks are steep and rocky and the bottom has many rifts. After Orsk, the river abruptly turns west and flows through a long canyon in the Guberlinsk Mountains. After

Uralsk Uralsk (russian: Уральск) is the name of several rural localities in Russia: *Uralsk, Republic of Bashkortostan, a '' selo'' in Uralsky Selsoviet of Uchalinsky District of the Republic of Bashkortostan * Uralsk, Orenburg Oblast, a ''selo'' ...

, it flows from north to south, through the territory of

West Kazakhstan Region West Kazakhstan Region ( kk, Батыс Қазақстан облысы, translit=Batys Qazaqstan oblysy; russian: Западно-Казахстанская область, translit=Zapadno-Kazakhstanskaya oblast) is a region of Kazakhstan. The re ...

and

Atyrau Region Atyrau Region ( kk, Атырау облысы / ; russian: Атырауская область) formerly known as Guryev Region (russian: Гурьевская область) until 1991, is one of the regions of Kazakhstan, in the west of the cou ...

of Kazakhstan. There, the river widens and has many lakes and ducts. Near the mouth, it splits into the Yaik and Zolotoy distributariesV. A. Balkov
Ural
(in Russian). bashedu.ru and forms vast wetlands. The

Yaik The Ural (russian: Урал, ), known before 1775 as Yaik (russian: Яик, ba, Яйыҡ, translit=Yayıq, ; kk, Жайық, translit=Jaiyq, ), is a river flowing through Russia and Kazakhstan in the continental border between Europe and Asia ...

distributary is shallow, with almost no trees on the shores, and is rich in fish; whereas Zolotoy is deeper and is navigable. Ural River has a spectacular tree-like (or "digitate") shape of the delta (see image). This type of delta forms naturally in the slow rivers which deliver a great deal of sediments and flow into a quiet sea. In the delta, from the mouth of the Zolotoy distributary lies Shalyga Island, which is long, with heights of and maximum widths of . The tributaries, in order going upstream, are Kushum, Derkul, Chagan, Irtek,

Utva Utva Aviation Industry (commonly known as UTVA) is a Serbian manufacturer of general aviation aircraft, subsidiary of Yugoimport SDPR, headquartered in Pančevo. History Utva was founded on 5 June 1937 in Zemun, since 1940 located in Pančev ...

, Ilek (major, left), Bolshaya Chobda, Kindel, Sakmara,

Tanalyk The Tanalyk (russian: Таналык; ba, Таналыҡ, ''Tanalıq''), is a river in Bashkortostan and Orenburg Oblast in Russia, a right tributary of the Ural.Or (major, left) and Suunduk. The entire length of the Ural River is considered the Europe-Asia boundary by most authoritative sources. "Europe" (plate 59); "Asia" (plate 74): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea with its outlets, the Bosporus and Dardanelles." Rarely, the smaller, shorter

Emba River The Emba ( kk, Ембі ''Embı'' or ''Jem'', russian: Эмба) in west Kazakhstan rises in the Mugodzhar Hills and flows into the Caspian Sea. It is long, and has a drainage basin of .

is claimed as the continental boundary, but that pushes "Europe" much further into "Central Asian"

. The Ural River bridge in

is even labeled with permanent monuments carved with the word "Europe" on one side, "Asia" on the other. Regardless, Kazakhstan has some European territory and is at times included in European political and sports organizations.

Hydrography

The river is mostly fed by melting snow (60–70%); the contribution of precipitation is relatively minor. Most of its annual discharge (65%) occurs during the spring floods, which occur in March and April near the mouth and in late April through June upstream; 30% drain during the summer and autumn and 5% in winter. During the floods, the river widens to above near Uralsk and to several tens of kilometers near the mouth. Water level is highest in later April upstream and in May downstream. Its fluctuation is in the upper stream, in the middle of the river and about in the delta. The average water discharge is near Orenburg, and at the Kushum village, which is from the mouth. The maximum discharge is and the minimum is . Average turbidity is at Orenburg and near Kushum. The river freezes at the source in early November and in the middle and lower reaches in late November. It opens in the lower reaches in late March and in early April in the upper reaches. The ice drift is relatively short. The average depth is near the source, and it increases in the middle reaches and especially near the mouth. The density of underwater vegetation also increases from the source to the mouth, so as the richness of the fauna. The bottom in the upper stream is rocky, with pebble and sand; it changes to silt-sand and occasionally clay downstream. The basin is asymmetrical – its left side from the river is 2.1 times larger in area than the right side; however, the right side is more important for feeding the river. The density of the tributaries is 0.29 km/km² in the right and 0.19 km/km² in the left side of the basin. The right-side tributaries are typical mountain rivers whereas the left-side tributaries have flatland character. About from the mouth there is a dangerous spot for shipping called Kruglovskaya prorva (russian: Кругловская прорва meaning Kruglovsk abyss). Here the river narrows and creates a strong vortex over a deep pit. The climate is continental with frequent and strong winds. Typical annual precipitation is .800 km on Ural River
(in Russian)Ural River
chelindustry.ru (in Russian)

Fauna

The wetlands at and near the delta of the Ural River are especially important to migrating birds as an important stop-over along the Asian flyway. They host many endemic and endangered species, such as

great white pelican The great white pelican (''Pelecanus onocrotalus'') also known as the eastern white pelican, rosy pelican or white pelican is a bird in the pelican family. It breeds from southeastern Europe through Asia and Africa, in swamps and shallow lakes. ...

Dalmatian pelican The Dalmatian pelican (''Pelecanus crispus'') is the largest member of the pelican family, and perhaps the world's largest freshwater bird, although rivaled in weight and length by the largest swans. They are elegant soaring birds, with wingspan ...

pygmy cormorant The pygmy cormorant (''Microcarbo pygmaeus'') is a member of the Phalacrocoracidae (cormorant) family of seabirds. It breeds in south-eastern Europe and south-western Asia. It is partially migratory, with northern populations wintering further ...

cattle egret The cattle egret (''Bubulcus ibis'') is a cosmopolitan species of heron (family Ardeidae) found in the tropics, subtropics, and warm-temperate zones. It is the only member of the monotypic genus ''Bubulcus'', although some authorities regard it ...

, little egret,

greater flamingo The greater flamingo (''Phoenicopterus roseus'') is the most widespread and largest species of the flamingo family. It is found in Africa, the Indian subcontinent, the Middle East, and in southern Europe. Taxonomy The greater flamingo was desc ...

white-headed duck The white-headed duck (''Oxyura leucocephala'') is a small diving duck some long. The male has a white head with black crown, a blue bill, and reddish-grey plumage. The female has a dark bill and rather duller colouring. Its breeding habitat is ...

ferruginous duck The ferruginous duck (''Aythya nyroca''), also known as ferruginous pochard, common white-eye or white-eyed pochard, is a medium-sized diving duck from Eurosiberia. The scientific name is derived from Greek '' aithuia'' an unidentified seabir ...

Eurasian spoonbill The Eurasian spoonbill (''Platalea leucorodia''), or common spoonbill, is a wading bird of the ibis and spoonbill family Threskiornithidae. The genus name ''Platalea'' is from Latin and means "broad", referring to the distinctive shape of the ...

glossy ibis The glossy ibis (''Plegadis falcinellus'') is a water bird in the order Pelecaniformes and the ibis and spoonbill family Threskiornithidae. The scientific name derives from Ancient Greek ''plegados'' and Latin, ''falcis'', both meaning "sickle" a ...

houbara bustard The houbara bustard (''Chlamydotis undulata''), also known as African houbara, is a relatively small bustard native to North Africa, where it lives in arid habitats. The global population is listed as Vulnerable on the IUCN Red List since 2014. ...

great black-headed gull Pallas's gull (''Ichthyaetus ichthyaetus''), also known as the great black-headed gull, is a large bird species. As is the case with many gulls, it has traditionally been placed in the genus ''Larus''. The scientific name is from Ancient Greek. '' ...

slender-billed gull The slender-billed gull (''Chroicocephalus genei'') is a mid-sized gull which breeds very locally around the Mediterranean and the north of the western Indian Ocean (e.g. Pakistan) on islands and coastal lagoons. Most of the population is somewh ...

squacco heron The squacco heron (''Ardeola ralloides'') is a small heron, long, of which the body is , with wingspan. It is of Old World origins, breeding in southern Europe and the Greater Middle East. Behaviour The squacco heron is a migrant, wintering ...

common crane The common crane (''Grus grus''), also known as the Eurasian crane, is a bird of the family Gruidae, the cranes. A medium-sized species, it is the only crane commonly found in Europe besides the demoiselle crane (''Grus virgo'') and the Siberian ...

, demoiselle crane,

slender-billed curlew The slender-billed curlew (''Numenius tenuirostris'') is a bird in the wader family Scolopacidae. Isotope analysis suggests the majority of the former population bred in the Kazakh Steppe despite a record from the Siberian swamps, and was migr ...

black stork The black stork (''Ciconia nigra'') is a large bird in the stork family Ciconiidae. It was first described by Carl Linnaeus in the 10th edition of his ''Systema Naturae''. Measuring on average from beak tip to end of tail with a wingspan, th ...

, red-breasted goose,

lesser white-fronted goose The lesser white-fronted goose (''Anser erythropus'') is a goose closely related to the larger white-fronted goose (''A. albifrons''). It breeds in the northernmost Palearctic, but it is a scarce breeder in Europe. There is a re-introduction sc ...

lesser kestrel The lesser kestrel (''Falco naumanni'') is a small falcon. This species breeds from the Mediterranean across Afghanistan and Central Asia, to China and Mongolia. It is a summer migrant, wintering in Africa and Pakistan and sometimes even to Indi ...

whooper swan The whooper swan ( /ˈhuːpə(ɹ) swɒn/) (''Cygnus cygnus''), also known as the common swan, pronounced ''hooper swan'', is a large northern hemisphere swan. It is the Eurasian counterpart of the North American trumpeter swan, and the type specie ...

tundra swan The tundra swan (''Cygnus columbianus'') is a small swan of the Holarctic. The two taxa within it are usually regarded as conspecific, but are also sometimes split into two species: Bewick's swan (''Cygnus bewickii'') of the Palaearctic and th ...

osprey The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor reaching more than in length and across the wings. It is brown o ...

pallid harrier The pale or pallid harrier (''Circus macrourus'') is a migratory bird of prey of the harrier subfamily. The scientific name is derived from the Ancient Greek. ''Circus'' is from ''kirkos'', referring to a bird of prey named for its circling fli ...

short-toed eagle The short-toed snake eagle (''Circaetus gallicus''), also known as the short-toed eagle, is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as kites, buzzards and harriers. The genus na ...

and many others. The pygmy cormorant was observed sporadically before 1999 and more regularly after that. Cattle egret is observed since 1990 between April and September (as most other migratory birds in this area), with the total population of several dozen couples. It feeds on frogs, mollusks and small fish.Фауна: Дельта реки Урал и прилегающее побережье Каспийского моря
wetlands.kz. (Fauna of the delta of Ural River, in Russian) Upstream, there are more of the resident bird species, such as

grouse Grouse are a group of birds from the order Galliformes, in the family Phasianidae. Grouse are presently assigned to the tribe Tetraonini (formerly the subfamily Tetraoninae and the family Tetraonidae), a classification supported by mitochondr ...

, wild pigeon and

partridge A partridge is a medium-sized Galliformes, galliform bird in any of several genera, with a wide Indigenous (ecology), native distribution throughout parts of Europe, Asia and Africa. Several species have been introduced to the Americas. They a ...

. Ural River is also important for many fish species of the Caspian Sea which visit its delta and migrate upstream for spawning. In the lower reaches of the river there are 47 species from 13 families. The family

Cyprinidae Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest verte ...

account for 40%, sturgeon and herring make up 11%, perch and herring 9% and salmon 4.4%. The main commercial species are

sturgeon Sturgeon is the common name for the 27 species of fish belonging to the family Acipenseridae. The earliest sturgeon fossils date to the Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretace ...

roach Roach may refer to: Animals * Cockroach, various insect species of the order Blattodea * Common roach (''Rutilus rutilus''), a fresh and brackish water fish of the family Cyprinidae ** ''Rutilus'' or roaches, a genus of fishes * California roach ...

bream Bream ( ) are species of freshwater and marine fish belonging to a variety of genera including '' Abramis'' (e.g., ''A. brama'', the common bream), '' Acanthopagrus'', ''Argyrops'', '' Blicca'', '' Brama'', '' Chilotilapia'', ''Etelis'', '' L ...

perch Perch is a common name for fish of the genus ''Perca'', freshwater gamefish belonging to the family Percidae. The perch, of which three species occur in different geographical areas, lend their name to a large order of vertebrates: the Percif ...

carp Carp are various species of oily freshwater fish from the family Cyprinidae, a very large group of fish native to Europe and Asia. While carp is consumed in many parts of the world, they are generally considered an invasive species in parts of ...

, asp and

Wels catfish The wels catfish ( or ; ''Silurus glanis''), also called sheatfish or just wels, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black and Caspian Seas. It has been introd ...

. The rare species include

Caspian salmon Caspian can refer to: *The Caspian Sea *The Caspian Depression, surrounding the northern part of the Caspian Sea *The Caspians, the ancient people living near the Caspian Sea *Caspian languages, collection of languages and dialects of Caspian peopl ...

sterlet The sterlet (''Acipenser ruthenus'') is a relatively small species of sturgeon from Eurasia native to large rivers that flow into the Black Sea, Azov Sea, and Caspian Sea, as well as rivers in Siberia as far east as Yenisei. Populations migratin ...

, white salmon and

kutum Kutum is a town in the Sudanese state of North Darfur. It lies northwest of the state capital, Al-Fashir. The town is located along a wadi and therefore also known as Wadi Kutum. It lies north along the Marrah Mountains; the Kutum volcanic fi ...

. In the delta of the river and nearby regions live about 48 animal species belonging to 7

orders Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

; most common are rodents (21 species) and predators (12). Among them,

Bobrinski's serotine Bobrinski's serotine (''Eptesicus bobrinskoi'') is a species of vesper bat. It can be found in Iran and Kazakhstan. Taxonomy Bobrinski's serotine was described as a new species in 1935 by Alexander Petrovitch Kuzyakin (also spelled Kuzjakin). Th ...

and

marbled polecat The marbled polecat (''Vormela peregusna'') is a small mammal belonging to the monotypic genus ''Vormela'' within the mustelid subfamily Ictonychinae. ''Vormela'' is from the German word , which means "little worm". The specific name ''peregusn ...

are endemic. Key species are

raccoon dog The common raccoon dog (''Nyctereutes procyonoides''), also called the Chinese or Asian raccoon dog, is a small, heavy-set, fox-like canid native to East Asia. Named for its raccoon-like face markings, it is most closely related to foxes. Common ...

muskrat The muskrat (''Ondatra zibethicus'') is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over a wide range of climates and habitat ...

(appeared recently),

European hare The European hare (''Lepus europaeus''), also known as the brown hare, is a species of hare native to Europe and parts of Asia. It is among the largest hare species and is adapted to temperate, open country. Hares are herbivorous and feed mainly ...

house mouse The house mouse (''Mus musculus'') is a small mammal of the order Rodentia, characteristically having a pointed snout, large rounded ears, and a long and almost hairless tail. It is one of the most abundant species of the genus '' Mus''. Althoug ...

brown rat The brown rat (''Rattus norvegicus''), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat, Norwegian rat and Parisian rat, is a widespread species of common rat. One of the largest muroids, it is a brown o ...

, and

wild boar The wild boar (''Sus scrofa''), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species is ...

. Wild boars had a density of 1.2–2.5 per hectare in 2000 and are hunted commercially. Others include

elk The elk (''Cervus canadensis''), also known as the wapiti, is one of the largest species within the deer family, Cervidae, and one of the largest terrestrial mammals in its native range of North America and Central and East Asia. The common ...

, fox, wolf, dwarf fat-tailed jerboa,

great gerbil The great gerbil (''Rhombomys opimus'') is a large rodent found throughout much of Central Asia. Description The largest of the gerbils, great gerbils have a head and body length of . Their skulls are distinctive by having two grooves in each i ...

, northern mole vole and

saiga antelope The saiga antelope (, ''Saiga tatarica''), or saiga, is a critically endangered antelope which during antiquity inhabited a vast area of the Eurasian steppe spanning the foothills of the Carpathian Mountains in the northwest and Caucasus in t ...

. The

Turkmenian kulan The Turkmenian kulan (''Equus hemionus kulan''), also called Transcaspian wild ass, Turkmenistani onager or simply the ', is a subspecies of onager (Asiatic wild ass) native to Central Asia. It was declared Endangered in 2016. The species's popu ...

(''Equus hemionus kulan'') used to live at the Ural River. It might be extinct from that region. The reptiles are represented by

bog turtle The bog turtle (''Glyptemys muhlenbergii'') is a critically endangered species of semiaquatic turtle in the family Emydidae. The species is endemic to the eastern United States. It was first scientifically described in 1801 after an 18th-century ...

s, common water snakes,

rat snakes Rat snakes are members – along with kingsnakes, milk snakes, vine snakes and indigo snakes – of the subfamily Colubrinae of the family Colubridae. They are medium to large constrictors and are found throughout much of the Northern Hemi ...

and

sand lizard The sand lizard (''Lacerta agilis'') is a lacertid lizard distributed across most of Europe from France and across the continent to Lake Baikal in Russia. It does not occur in European Turkey. Its distribution is often patchy. In the sand lizard ...

. Bog turtles are found in all waters. Common water snakes live on the banks of canals. Rat snakes and sand lizards are few and inhabit relatively high areas of land. Two more reptiles,

Caspian whipsnake The Caspian whipsnake (''Dolichophis caspius'', sometimes also ''Coluber caspius'') also known as the large whipsnake (among various other species in genus ''Dolichophis''/'' Coluber''), is a common species of whipsnake found in the Balkans ...

and '' Coluber spinalis'', are extremely rare. Among amphibians common are lake frog and green frog. With an estimated 5,000 to 10,000 species, insects exceed all other animals of the region by diversity and biomass. Terrestrial and aquatic insects make up a significant proportion of the diet of birds. Many species are parasitic on birds and transmit infection. Other dominating inhabitants of the river are

protozoa Protozoa (singular: protozoan or protozoon; alternative plural: protozoans) are a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris. Histo ...

rotifer The rotifers (, from the Latin , "wheel", and , "bearing"), commonly called wheel animals or wheel animalcules, make up a phylum (Rotifera ) of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John H ...

Cladocera The Diplostraca or Cladocera, commonly known as water fleas, are a superorder of small crustaceans that feed on microscopic chunks of organic matter (excluding some predatory forms). Over 1000 species have been recognised so far, with many more ...

and

copepod Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor) ...

s. Mollusks are mostly represented by

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

s and

bivalve Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bival ...

Industry

Water from the upper reaches of the Ural River is used to supply the prominent Magnitogorsk ( Magnitogorsk Iron and Steel Works, built in the early 1930s) and Orsk-Khalilovsk metallurgical plants, and the low reaches are used for irrigation. Two reservoirs were created near Magnitogorsk, and there is a hydroelectric plant near the village of Iriklinskaya with the corresponding reservoir. Below Uralsk, there is another reservoir and the Kushumsky channel. The river is navigated up to Uralsk and there is a port in Atyrau. Fishery is well developed; the commercial fish species include

herring Herring are forage fish, mostly belonging to the family of Clupeidae. Herring often move in large schools around fishing banks and near the coast, found particularly in shallow, temperate waters of the North Pacific and North Atlantic Oceans, i ...

and

catfish Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...

. The delta of Ural River accounts for about half of the fish catchment in Kazakhstan. Also widespread is agriculture, especially growth of melons and watermelons. The city of

is a major oil producing center of Kazakhstan.

Etymology

The river was called (Daïkos) by

Ptolemy Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importanc ...

in the 2nd century AD. Yulian Kulakovsky reads this as Turkic " Jajyk" or "Яик" and on this basis identifies the Huns as Turkic speakers. However,

Gerard Clauson Sir Gerard Leslie Makins Clauson (28 April 1891 – 1 May 1974) was an English civil servant, businessman, and Orientalist best known for his studies of the Turkic languages. The eldest son of Major Sir John Eugene Clauson, Gerard Clauson atten ...

disputes that the name could be of Turkic origin as early as the 2nd century, and instead attributes it to

Sarmatian The Sarmatians (; grc, Σαρμαται, Sarmatai; Latin: ) were a large confederation of Ancient Iranian peoples, ancient Eastern Iranian languages, Eastern Iranian peoples, Iranian Eurasian nomads, equestrian nomadic peoples of classical ant ...

origin. Also, the version of origin from the ancient Finno-Ugric and subsequent adaptation by other language groups has not been sufficiently studied (the river originates in the alleged ancestral home of the

Finno-Ugric languages Finno-Ugric ( or ; ''Fenno-Ugric'') or Finno-Ugrian (''Fenno-Ugrian''), is a traditional grouping of all languages in the Uralic language family except the Samoyedic languages. Its formerly commonly accepted status as a subfamily of Uralic is ...

). In modern Finno-Ugric, the closest surviving forms are found: "joki" (Finnish), "jogi" (Karelian), "jā" (Mansi), "ju" (Komi) - river, "jəŋk" (Khanty) - water. Also, hypothetically Finno-Ugric titles may have tributaries of the Yaik River, for example Ilek (Erzya "Ilyk" - strength) and Utva (Komi "Ytva" - spring water). In the 10th-Century work '' De Administrando Imperio'',

Byzantine The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...

Emperor Constantine VII Porphyrogenitus referred to the Ural River as the "Geich." The name Яйыҡ (Yayıq) is currently used in the

Bashkir language Bashkir (, ; Bashkir: ''Bashqortsa'', ''Bashqort tele'', ) is a Turkic language belonging to the Kipchak branch. It is co-official with Russian in Bashkortostan. It is spoken by approximately 1.4 million native speakers in Russia, as well as i ...

and Жайық (Zhayıq) in Kazakhstan. In later European texts it is sometimes mentioned as ''Rhymnus fluvius'' and in the Russian chronicle of 1140 as Yaik. The river was renamed Ural in the Russian language in 1775, by

Catherine II of Russia , en, Catherine Alexeievna Romanova, link=yes , house = , father = Christian August, Prince of Anhalt-Zerbst , mother = Joanna Elisabeth of Holstein-Gottorp , birth_date = , birth_name = Princess Sophie of Anhal ...

History

In the 10th to 16th centuries, the city of Saray-Jük (or Saraichik, meaning "small Sarai") on the Ural River (now in Atyrau Province of Kazakhstan) was an important trade center on the

Silk Road The Silk Road () was a network of Eurasian trade routes active from the second century BCE until the mid-15th century. Spanning over 6,400 kilometers (4,000 miles), it played a central role in facilitating economic, cultural, political, and reli ...

. In the 13th century, it became a stronghold of the

Golden Horde The Golden Horde, self-designated as Ulug Ulus, 'Great State' in Turkic, was originally a Mongols, Mongol and later Turkicized khanate established in the 13th century and originating as the northwestern sector of the Mongol Empire. With the fr ...

. It was destroyed in 1395 by the army of

Timur Timur ; chg, ''Aqsaq Temür'', 'Timur the Lame') or as ''Sahib-i-Qiran'' ( 'Lord of the Auspicious Conjunction'), his epithet. ( chg, ''Temür'', 'Iron'; 9 April 133617–19 February 1405), later Timūr Gurkānī ( chg, ''Temür Kür ...

but then rebuilt to become the capital of

Nogai Horde The Nogai Horde was a confederation founded by the Nogais that occupied the Pontic–Caspian steppe from about 1500 until they were pushed west by the Kalmyks and south by the Russians in the 17th century. The Mongol tribe called the Manghuds cons ...

in the 15th and 16th centuries. It was finally reduced to a village in 1580 by the

Ural Cossacks The Ural Cossack Host was a cossack host formed from the Ural Cossacks – those Eurasian cossacks settled by the Ural River. Their alternative name, Yaik Cossacks, comes from the old name of the river. They were also known by the names: *Rus ...

After the Russian conquest of the Ural basin in the late 16th century, the shores of the Ural became home to the

Yaik Cossacks The Ural Cossack Host was a cossack host formed from the Ural Cossacks – those Eurasian cossacks settled by the Ural River. Their alternative name, Yaik Cossacks, comes from the old name of the river. They were also known by the names: *Rus ...

. One of their main activities was fishing for the sturgeon and related fishes (including the true sturgeon,

starry sturgeon The starry sturgeon (''Acipenser stellatus'') also known as stellate sturgeon or sevruga (Drakul, , and tr, Uzun Burun, lit=long nosed), is a species of sturgeon. It is native to the Black, Azov, Caspian and Aegean sea basins, but it has b ...

, and

beluga The beluga whale (/bɪˈluːɡə/) (Delphinapterus leucas) is an Arctic and sub-Arctic cetacean. It is one of two members of the family Monodontidae, along with the narwhal, and the only member of the genus Delphinapterus. It is also known as the wh ...

) in the Ural River and the Caspian. A great variety of fishing techniques existed; the most famous of them was ''bagrenye'' (russian: багренье, from ''bagor'' russian: багор, meaning

pike pole A pike pole is a long metal-topped wooden, aluminium or fiberglass pole used for reaching, hooking and/or pulling on another object. They are variously used in boating, construction, logging, rescue and recovery, power line maintenance, and fire ...

): spearing hibernating sturgeons in their underwater lairs in mid-winter. The ''bagrenye'' was allowed only on one day of the year. On the appointed day, a large number of Cossacks with pike poles were gathering on the shore; after a signal was given, they rushed on the ice, broke it with their poles, and speared and pulled the fish. Another fishing technique was constructing a

weir A weir or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of l ...

, known as the ''uchug'' ( учуг) across the river, to catch fish going upstream to spawn. Until 1918, an ''uchug'' was set up in the summer and autumn near Uralsk, so that the fish would not go upstream beyond the Cossacks' land. While the ''uchug'' weirs were also known in the

Volga Delta The Volga Delta is the largest river delta in Europe, and occurs where Europe's largest river system, the Volga River, drains into the Caspian Sea in Russia's Astrakhan Oblast, north-east of the republic of Kalmykia. The delta is located in the ...

, the ''bagrenye'' was thought to be a uniquely Ural technique. The Ural Cossacks (known originally as the Yaik Cossacks) resented the attempts by the central government to impose rules and regulations on them, and on occasions rose in rebellions. The largest rebellion, the

Pugachev's Rebellion Pugachev's Rebellion (, ''Vosstaniye Pugachyova''; also called the Peasants' War 1773–1775 or Cossack Rebellion) of 1773–1775 was the principal revolt in a series of popular rebellions that took place in the Russian Empire after Catherine ...

of 1773–75, involved not only the Ural, but much of south-eastern Russia, and resulted in a loss of the government control there. After its suppression, Empress Catherine issued a decree of 15 January 1775 to rename most of the places involved in the revolt, in order to erase the memory of it. Thus the Yaik River and the city of Yaitsk were renamed to the Ural River and

, respectively, and the Yaik Cossacks became the Ural Cossacks.

References

Bibliography

* {{Authority control Rivers of Kazakhstan Rivers of Russia Tributaries of the Caspian Sea Rivers of Chelyabinsk Oblast Rivers of Bashkortostan Rivers of Orenburg Oblast Border rivers International rivers of Asia International rivers of Europe Ural Mountains History of Ural