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The Eurasian jay (''Garrulus glandarius'') is a species of
passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped') which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their ...
bird in the crow family
Corvidae Corvidae is a Cosmopolitan distribution, cosmopolitan Family (biology), family of Songbird, oscine passerine birds that contains the crows, ravens, Rook (bird), rooks, magpies, jackdaws, jays, treepies, choughs, and Nutcracker (bird), nutcrackers ...
. It has pinkish brown plumage with a black stripe on each side of a whitish throat, a bright blue panel on the upper wing and a black tail. The Eurasian jay is a woodland bird that occurs over a vast region from western Europe and north-west Africa to the
Indian subcontinent The Indian subcontinent is a physiographic region of Asia below the Himalayas which projects into the Indian Ocean between the Bay of Bengal to the east and the Arabian Sea to the west. It is now divided between Bangladesh, India, and Pakista ...
and further to the eastern seaboard of Asia and down into south-east Asia. Across this vast
range Range may refer to: Geography * Range (geographic), a chain of hills or mountains; a somewhat linear, complex mountainous or hilly area (cordillera, sierra) ** Mountain range, a group of mountains bordered by lowlands * Range, a term used to i ...
, several distinct racial forms have evolved which look different from each other, especially when comparing forms at the extremes of its range. The bird is called jay, without any
epithet An epithet (, ), also a byname, is a descriptive term (word or phrase) commonly accompanying or occurring in place of the name of a real or fictitious person, place, or thing. It is usually literally descriptive, as in Alfred the Great, Suleima ...
s, by English speakers in
Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
and
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
.


Taxonomy and systematics

The Eurasian jay was formally described by the Swedish naturalist
Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...
in 1758 in the tenth edition of his ''
Systema Naturae ' (originally in Latin written ' with the Orthographic ligature, ligature æ) is one of the major works of the Sweden, Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the syste ...
'' under the
binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...
''Corvus glandarius''. Linnaeus specified the locality as "Europa" but this was restricted to Sweden by
Ernst Hartert Ernst Johann Otto Hartert (29 October 1859 – 11 November 1933) was a widely published German ornithologist. Life and career Hartert was born in the Free and Hanseatic City of Hamburg on 29 October 1859. In July 1891, he married the illustrat ...
in 1903. The Eurasian jay is now one of three species placed in the genus ''
Garrulus ''Garrulus'' is a genus of Old World jays, passerine birds in the family Corvidae. Taxonomy and systematics The genus was established by French zoologist Mathurin Jacques Brisson in 1760. The type species is the Eurasian jay (''Garrulus glanda ...
'' that was established in 1760 by the French zoologist
Mathurin Jacques Brisson Mathurin Jacques Brisson (; 30 April 1723 – 23 June 1806) was a French zoologist and natural philosophy, natural philosopher. Brisson was born on 30 April 1723 at Fontenay-le-Comte in the Vendée department of western France. Note that page 14 ...
. The genus name ''Garrulus'' is a
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
word meaning "chattering", "babbling" or "noisy". The specific epithet ''glandarius'' is
Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
meaning "of acorns". Eight racial groups (33
subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...
in total) were recognised by Steve Madge & Hilary Burn in 1994: * the nominate group (nine European races), with a streaked . * the ''cervicalis'' group (three races in
North Africa North Africa (sometimes Northern Africa) is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region. However, it is sometimes defined as stretching from the Atlantic shores of t ...
), with a rufous nape, grey , very pale head sides, and a streaked or black crown. * the ''atricapillus'' group (four races in
Middle East The Middle East (term originally coined in English language) is a geopolitical region encompassing the Arabian Peninsula, the Levant, Turkey, Egypt, Iran, and Iraq. The term came into widespread usage by the United Kingdom and western Eur ...
,
Crimea Crimea ( ) is a peninsula in Eastern Europe, on the northern coast of the Black Sea, almost entirely surrounded by the Black Sea and the smaller Sea of Azov. The Isthmus of Perekop connects the peninsula to Kherson Oblast in mainland Ukrain ...
&
Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...
), with a uniform mantle & nape, black crown and very pale face. * the race ''hyrcanus'' (
Caspian Hyrcanian mixed forests The Hyrcanian forests (; ) are a zone of lush lowland and montane forests covering about near the shores of the Caspian Sea in Iran and Azerbaijan. The forest is named after the ancient region of Hyrcania. The World Wide Fund for Nature refers t ...
of
Iran Iran, officially the Islamic Republic of Iran (IRI) and also known as Persia, is a country in West Asia. It borders Iraq to the west, Turkey, Azerbaijan, and Armenia to the northwest, the Caspian Sea to the north, Turkmenistan to the nort ...
), small with black forecrown and broadly streaked hindcrown. * the ''brandtii'' group (four races in
Siberia Siberia ( ; , ) is an extensive geographical region comprising all of North Asia, from the Ural Mountains in the west to the Pacific Ocean in the east. It has formed a part of the sovereign territory of Russia and its predecessor states ...
and northern
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
), with a streaked crown, reddish head, dark iris and grey mantle. * the ''leucotis'' group (two races in
south-east Asia Southeast Asia is the geographical southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Australian mainland, which is part of Oceania. Southeast Asia i ...
), with no white in the wing, a white forecrown, black hindcrown and much white on the sides of the head. * the ''bispecularis'' group (six races in the
Himalaya The Himalayas, or Himalaya ( ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the Earth's highest peaks, including the highest, Mount Everest. More than 100 pea ...
n region), with an unstreaked rufous crown, and no white wing-patch. * the ''japonicus'' group (four races in the southern Japanese islands), with a large white wing-patch, blackish face and scaled crown. The
International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...
(IUCN) and
Birdlife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding i ...
split the Eurasian jay into three species. The subspecies ''G. g. leucotis'' becomes the white-face jay (''Garrulus leucotis'') and the ''bispecularis'' group containing six subspecies becomes the plain-crowned jay (''Garrulus bispecularis''). Eurasian Jay Dugalbitta Chamoli Uttarakhand India 13.06.2013.jpg, ''G. g. bispecularis''
Uttarakhand Uttarakhand (, ), also known as Uttaranchal ( ; List of renamed places in India, the official name until 2007), is a States and union territories of India, state in North India, northern India. The state is bordered by Himachal Pradesh to the n ...
, India Garrulus glandarius IL Jerusalem.JPG, ''G. g. atricapillus''
Jerusalem Jerusalem is a city in the Southern Levant, on a plateau in the Judaean Mountains between the Mediterranean Sea, Mediterranean and the Dead Sea. It is one of the List of oldest continuously inhabited cities, oldest cities in the world, and ...
, Israel Cyprus jay (Garrulus glandarius glaszneri).jpg, ''G. g. glaszneri''
Troodos Mountains, Cyprus


Description

The Eurasian jay is a relatively small
corvid Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. In colloquial English, they are known as the crow family or corvids. Curre ...
, similar in size to a western jackdaw (''Coloeus monedula'') with a length of and a wingspan of . The nominate race has light rufous brown to a pinkish brown body plumage. The whitish throat is bordered on each side by a prominent black moustache stripe. The forehead and crown are whitish with black stripes. The rump is white. The complex colouring on the upper surface of the wing includes black and white bars and a prominent bright blue patch with fine black bars. The tail is mainly black.


Voice

The most characteristic call is a harsh, rasping screech that is used upon sighting various predators and as an advertising call. The jay is well known for its
mimicry In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species. Mimicry may evolve between different species, or between individuals of the same species. In the simples ...
, often sounding so like a different species that it is difficult to distinguish its true identity unless the bird is seen. It will imitate the calls of birds of prey such as the mew of the
common buzzard The common buzzard (''Buteo buteo'') is a medium-to-large bird of prey which has a large range. It is a member of the genus '' Buteo'' in the family Accipitridae. The species lives in most of Europe and extends its breeding range across much of ...
and the cackle of the northern goshawk.


Distribution and habitat

A member of the widespread jay group, it inhabits mixed
woodland A woodland () is, in the broad sense, land covered with woody plants (trees and shrubs), or in a narrow sense, synonymous with wood (or in the U.S., the '' plurale tantum'' woods), a low-density forest forming open habitats with plenty of sunli ...
, particularly with
oak An oak is a hardwood tree or shrub in the genus ''Quercus'' of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisp ...
s, and is a habitual
acorn The acorn is the nut (fruit), nut of the oaks and their close relatives (genera ''Quercus'', ''Notholithocarpus'' and ''Lithocarpus'', in the family Fagaceae). It usually contains a seedling surrounded by two cotyledons (seedling leaves), en ...
hoarder. In recent years, the bird has begun to migrate into urban areas, possibly as a result of continued erosion of its woodland habitat. Before humans began planting the trees commercially on a wide scale, Eurasian jays were the main source of movement and propagation for the European oak (''Q. robur''), each bird having the ability to spread more than a thousand acorns each year. Eurasian jays will also bury the acorns of other oak species, and have been cited by the
National Trust The National Trust () is a heritage and nature conservation charity and membership organisation in England, Wales and Northern Ireland. The Trust was founded in 1895 by Octavia Hill, Sir Robert Hunter and Hardwicke Rawnsley to "promote the ...
as a major propagator of the largest population of holm oak (''Q. ilex'') in Northern Europe, situated in
Ventnor Ventnor () is a seaside resort town and civil parishes in England, civil parish established in the Victorian era on the southeast coast of the Isle of Wight, England, from Newport, Isle of Wight, Newport. It is situated south of St Boniface D ...
on the
Isle of Wight The Isle of Wight (Help:IPA/English, /waɪt/ Help:Pronunciation respelling key, ''WYTE'') is an island off the south coast of England which, together with its surrounding uninhabited islets and Skerry, skerries, is also a ceremonial county. T ...
. Jays have been recorded carrying single acorns as far as 20 km, and are credited with the rapid northward spread of oaks following the last ice age.


Behaviour and ecology


Breeding

Eurasian jays normally first breed when two years of age, although they occasionally breed when only one year. Both sexes build the nest which is usually placed in a fork or on a branch of a tree close to the main trunk at a height of above the ground. Very occasionally the nest is located on a building. The nest has a base of twigs in diameter and a lining of thinner twigs, roots, grass, moss and leaves. The eggs are laid daily, normally early in the morning. The clutch is 3–6 eggs which are pale green to pale olive brown and are covered with fine darker speckles. They sometimes have brown or black streaks concentrated at the broader end. The eggs are and weigh around . They are incubated by the female and hatch after 16–19 days. While the female is on the nest the male brings her food. Both parents feed and care for the young which fledge after 19–23 days. The parents continue to feed the fledgelings until they are 6–8 weeks of age. Only a single brood is raised each year. The maximum recorded age is 16 years and 9 months for a bird in Skelton, York, United Kingdom, that was ringed in 1966 and found dead in 1983. File:Jay Nest 13-05-12 (7190059330).jpg, Nest with eggs File:Juvenile jay on apartment step.jpg, Juvenile Eurasian jay in South Korea Garrulus glandarius atricapillus MHNT.ZOO.2010.11.170.18.jpg, ''Garrulus glandarius atricapillus'' - MHNT


Diet

Feeding in both trees and on the ground, it takes a wide range of
invertebrate Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...
s including many pest insects, acorns (
oak An oak is a hardwood tree or shrub in the genus ''Quercus'' of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisp ...
seeds, which it buries for use during winter),
beech Beech (genus ''Fagus'') is a genus of deciduous trees in the family Fagaceae, native to subtropical (accessory forest element) and temperate (as dominant element of Mesophyte, mesophytic forests) Eurasia and North America. There are 14 accepted ...
and other
seed In botany, a seed is a plant structure containing an embryo and stored nutrients in a protective coat called a ''testa''. More generally, the term "seed" means anything that can be Sowing, sown, which may include seed and husk or tuber. Seeds ...
s,
fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...
s such as
blackberries BlackBerry is a discontinued brand of handheld devices and related mobile services, originally developed and maintained by the Canadian company Research In Motion (RIM, later known as BlackBerry Limited) until 2016. The first BlackBerry device ...
and rowan berries, young
bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...
s and eggs, bats, and small
rodents Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are n ...
. Like most species, the jay's diet changes with the seasons but is noteworthy for its prolific caching of food—especially oak acorns and beechnuts—for winter and spring. While caching occurs throughout the year, it is most intense in the autumn.


Health

In order to keep its plumage free from parasites, it lies on top of anthills with spread wings and lets its feathers be sprayed with
formic acid Formic acid (), systematically named methanoic acid, is the simplest carboxylic acid. It has the chemical formula HCOOH and structure . This acid is an important intermediate in chemical synthesis and occurs naturally, most notably in some an ...
.


Intelligence

Similar to other corvids, Eurasian jays have been reported to plan for future needs. Male Eurasian jays also take into account the desires of their partner when sharing food with her as a courtship ritual and when protecting food items from thieving conspecifics.


References


Cited sources

*


Further reading

*


External links


The Royal Society for the Protection of Birds (RSPB) - Birds & Wildlife - Jay

Ageing and sexing by Javier Blasco-Zumeta & Gerd-Michael Heinze
(PDF; 1.1 MB)



* * * * *
Eurasian jay media
from
ARKive ARKive was a global initiative with the mission of "promoting the conservation of the world's threatened species, through the power of wildlife imagery", which it did by locating and gathering films, photographs and audio recordings of the wor ...
{{Authority control Garrulus Birds of Eurasia Birds of the Himalayas Birds described in 1758 Taxa named by Carl Linnaeus