The eyebrowed thrush (''Turdus obscurus'') is a member of the

thrush Thrush may refer to: Birds * Thrush (bird), any of the birds in the family Turdidae ** List of thrush species * Antthrushes, the Formicariidae family of birds * Dohrn's warbler, or Dohrn's thrush-babbler, a species ''Sylvia dohrni'' in the famil ...

family Turdidae. It breeds in dense

conifer Conifers () are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a sin ...

ous forest and

taiga Taiga or tayga ( ; , ), also known as boreal forest or snow forest, is a biome characterized by coniferous forests consisting mostly of pines, spruces, and larches. The taiga, or boreal forest, is the world's largest land biome. In North A ...

eastwards from

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

Mongolia Mongolia is a landlocked country in East Asia, bordered by Russia to the north and China to the south and southeast. It covers an area of , with a population of 3.5 million, making it the world's List of countries and dependencies by po ...

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 ...

. It is strongly migratory, wintering south to China and

Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...

. It is a rare vagrant to western

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

Taxonomy

The eyebrowed thrush was

formally described A species description is a formal scientific description of a newly encountered species, typically articulated through a scientific publication. Its purpose is to provide a clear description of a new species of organism and explain how it differ ...

in 1789 by the German naturalist

Johann Friedrich Gmelin Johann Friedrich Gmelin (8 August 1748 – 1 November 1804) was a German natural history, naturalist, chemist, botanist, entomologist, herpetologist, and malacologist. Education Johann Friedrich Gmelin was born as the eldest son of Philipp F ...

in his revised and expanded edition of

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 ...

's ''

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 ...

''. He placed it with the thrushes in the

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

Turdus ''Turdus'' is a genus of medium-sized mostly insectivorous or omnivorous birds in the wider thrush family, Turdidae. The genus name ''Turdus'' is Latin for 'thrush'. Most of the species are called thrushes; the term thrush is also used for man ...

'' and coined 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 ...

''Turdus obscurus''. The scientific name comes from

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 ...

''Turdus'' meaning "thrush" and ''obscurus'' meaning "dark" or "dusky". Gmelin based his account on the "Dark thrush" that had been described in 1783 by the English ornithologist John Latham in his multi-volume work ''A General Synopsis of Birds''. Latham noted that "This is Sibirian species and found in the woods beyond Lake Baikal" but did not explain the source of his information. The species is

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unisp ...

: no

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 ...

are recognised.

Description

This is an attractive thrush, with a grey back and head, the latter having a black eyeline, bordered white above and below. The breast and flanks are orange, and the belly white. The sexes are fairly similar, but immatures have a browner back. The male has a simple whistling song, similar to the related

mistle thrush The mistle thrush (''Turdus viscivorus'') is a bird common to much of Europe, Palearctic, temperate Asia and North Africa. It is a year-round resident in a large part of its range, but northern and eastern populations bird migration, migrate s ...

Behaviour

It nests in trees, laying 4-6

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the ...

s in a neat nest. Migrating birds and wintering birds often form small flocks. It is omnivorous, eating a wide range of

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

earthworm An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they we ...

s and

berries A berry is a small, pulpy, and often edible fruit. Typically, berries are juicy, rounded, brightly colored, sweet, sour or tart, and do not have a stone fruit, stone or pit (fruit), pit although many wikt:pip#Etymology 2, pips or seeds may be p ...

. In 2007 an eyebrowed thrush was sighted at the

Jerusalem Bird Observatory The Jerusalem Bird Observatory is an urban bird observatory in Israel, sited on a plot in central Jerusalem between the Knesset and the Supreme Court. History The Jerusalem Bird Observatory was established in 1994 by the Society for the Prote ...

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 ...

. This is the second recorded sighting in

Israel Israel, officially the State of Israel, is a country in West Asia. It Borders of Israel, shares borders with Lebanon to the north, Syria to the north-east, Jordan to the east, Egypt to the south-west, and the Mediterranean Sea to the west. Isr ...

; the first was at

Eilat Eilat ( , ; ; ) is Israel's southernmost city, with a population of , a busy port of Eilat, port and popular resort at the northern tip of the Red Sea, on what is known in Israel as the Gulf of Eilat and in Jordan as the Gulf of Aqaba. The c ...

in October 1996. In 2011, an eyebrowed thrush was sighted in

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

, near Malanda in

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

. This is possibly the first confirmed sighting of the species on the Australian mainland.

Fossil record

In 2017, an assessment of late Pleistocene Indonesian passerines found a fossil of this species.

Gallery

File:Eyebrowed Thrush from Khonoma bird watching tour to Nagaland.jpg File:Hoetmaytrang.jpg, Eyebrowed thrush from

Khonoma Khonoma is a Angami Naga#Western Angami, Western Angami Naga people, Naga village located about 20 km west from Kohima, the capital of the Indian state of Nagaland. The village is referred to as ''Khwüno-ra'' (named after the Angami language, An ...

village in

Nagaland Nagaland () is a States and union territories of India, state in the northeast India, north-eastern region of India. It is bordered by the Indian states of Arunachal Pradesh to the north, Assam to the west, Manipur to the south, and the Naga Sel ...

, India File:Turdus obscurus MWNH 1761.JPG, Egg, Collection

Museum Wiesbaden The Museum Wiesbaden is a two-branch museum of Art museum, art and Natural history museum, natural history in the Hesse, Hessian capital of Wiesbaden, Germany. It is one of the three Hessian State museums, in addition to the museums in Hessian ...

References

eyebrowed thrush Birds of North Asia Wintering birds of Indomalaya eyebrowed thrush eyebrowed thrush {{turdidae-stub