The red-billed leiothrix (''Leiothrix lutea'') is a member of the family
Leiothrichidae
The laughingthrushes are a family, Leiothrichidae, of Old World passerine birds. They are diverse in size and coloration. These are birds of tropical areas, with the greatest variety in Southeast Asia and the Indian subcontinent. The entire fami ...
Himalayas
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 planet's highest peaks, including the very highest, Mount Everest. Over 100 ...
. Adults have bright red bills and a dull yellow ring around their eyes. Their backs are dull olive green, and they have a bright yellow-orange throat with a yellow chin; females are somewhat duller than males, and juveniles have black bills. It has also been introduced in various parts of the world, with small populations of escapees having existed in
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
since the 1980s. It has become a common
cagebird
Aviculture is the practice of keeping and breeding birds, especially of wild birds in captivity.
Types
There are various reasons that people get involved in aviculture. Some people breed birds to preserve a species. Some people breed parrots ...
and amongst aviculturists it goes by various names: Pekin robin, Pekin nightingale, Japanese nightingale, and Japanese (hill) robin, the last two being misnomers as it is not native to Japan (although it has been introduced and naturalised there).Long, John L. Introduced Birds Of The World. 1981
Taxonomy
The red-billed leiothrix was formally described in 1786 by the Austrian naturalist
Giovanni Antonio Scopoli
Giovanni Antonio Scopoli (sometimes Latinized as Johannes Antonius Scopolius) (3 June 1723 – 8 May 1788) was an Italian physician and naturalist. His biographer Otto Guglia named him the "first anational European" and the "Linnaeus of the Au ...
under the
binomial name
In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...
''Sylvia lutea''. The species is now placed together with the silver-eared mesia in the genus '' Leiothrix'' that was introduced in 1832 by the English naturalist
William John Swainson
William John Swainson FLS, FRS (8 October 1789 – 6 December 1855), was an English ornithologist, malacologist, conchologist, entomologist and artist.
Life
Swainson was born in Dover Place, St Mary Newington, London, the eldest son of ...
. The genus name combines the Ancient Greek ''leios'' meaning "smooth" and ''thrix'' meaning "hair". The specific epithet ''lutea'' is from Latin ''luteus'' meaning "saffron-yellow". Scopoli specified the type location as China but this was subsequently restricted to the mountainous regions of the Chinese province of
Anhui
Anhui , (; formerly romanized as Anhwei) is a landlocked province of the People's Republic of China, part of the East China region. Its provincial capital and largest city is Hefei. The province is located across the basins of the Yangtze River ...
.
Five
subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...
are recognised:
* ''L. l. kumaiensis'' Whistler, 1943 – northwest Himalayas
* ''L. l. calipyga'' (
Hodgson
Hodgson is a surname. In Britain, the Hodgson surname was the 173rd most common (766 per million) in 1881 and the 206th most common (650 per million) in 1998. In the United States of America, Hodgson was the 3753rd most popular surname (30 per mill ...
, 1837) – central Himalayas to northwest Myanmar
* ''L. l. yunnanensis''
Rothschild
Rothschild () is a name derived from the German ''zum rothen Schild'' (with the old spelling "th"), meaning "with the red sign", in reference to the houses where these family members lived or had lived. At the time, houses were designated by sign ...
, 1921 – northeast Myanmar and south China
* ''L. l. kwangtungensis'' Stresemann, 1923 – southeast China and north Vietnam
* ''L. l. lutea'' (
Scopoli
Giovanni Antonio Scopoli (sometimes Latinized as Johannes Antonius Scopolius) (3 June 1723 – 8 May 1788) was an Italian physician and naturalist. His biographer Otto Guglia named him the "first anational European" and the "Linnaeus of the Au ...
, 1786) – south-central, east China
Description
The leiothrix is about six inches in length, generally olive green, and has a yellow throat with orange shading on the breast. It also has a dull yellowish ring around the eye that extends to the beak. The edges of the wing feathers are brightly coloured with yellow, orange, red and black and the forked tail is olive brown and blackish at the tip. The cheeks and side of the neck are a bluish grey colour.Whistler, Hugh . Popular Handbook Of Indian Birds. 4th ed. 1963. The female is a lot paler than the male and lacks the red patch on the wings. It doesn't fly frequently, except in open
habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...
s. This bird is very active and an excellent singer but very secretive and difficult to see.Male, T.D., Fancy, S.G, and Ralph, C.J. "Red- Billed Leiothrix." The birds of North America (1998)
Distribution and habitat
The leiothrix is usually found in India, Bhutan, Nepal, Burma and parts of Tibet.Hvass, Hans. Birds of the World In Color. 1964. This species is a bird of the hill
forest
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...
s, found in every type of jungle though it prefers
pine
A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accepts ...
forests with bushes. It has also been found at elevations ranging from near sea level to about 7,500 feet.Berger, Andrew. Hawaiian Birdlife. 1972. In Japan it prefers forests of ''
Abies
Firs (''Abies'') are a genus of 48–56 species of evergreen coniferous trees in the family Pinaceae. They are found on mountains throughout much of North and Central America, Europe, Asia, and North Africa. The genus is most closely related to ...
'' and ''
Tsuga
''Tsuga'' (, from Japanese (), the name of ''Tsuga sieboldii'') is a genus of conifers in the subfamily Abietoideae of Pinaceae, the pine family. The common name hemlock is derived from a perceived similarity in the smell of its crushed foliag ...
'' with a dense understorey of
bamboo
Bamboos are a diverse group of evergreen perennial flowering plants making up the subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family. The origin of the word "bamboo" is uncertain, but ...
.
The species was introduced to the
Hawaiian Islands
The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost Ku ...
in 1918 and spread to all the forested islands except Lanai. Its population on Oahu crashed in the 1960s and it disappeared from Kauai, but is now common and increasing on Oahu. The leiothrix was released in Western Australia but it failed to become established. This species was also introduced in Great Britain but permanent establishment was thought to be unsuccessful, although a cluster of sightings in 2020–2022 in southern England suggests that some colonies may have been established. It was introduced to France, where it is now established in several areas, and Spain where it is increasing and spreading from the Collserola Park. In Japan, naturalised populations of what is probably the nominate subspecies of this species have been recorded since the 1980s and it has become established in central and southwestern Japan. It is also established on the
Mascarene
The Mascarene Islands (, ) or Mascarenes or Mascarenhas Archipelago is a group of islands in the Indian Ocean east of Madagascar consisting of the islands belonging to the Republic of Mauritius as well as the French department of Réunion. Their ...
island of
Réunion
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island o ...
. The species has also been introduced in Italy where three major populations can be identified (
Latium
Latium ( , ; ) is the region of central western Italy in which the city of Rome was founded and grew to be the capital city of the Roman Empire.
Definition
Latium was originally a small triangle of fertile, volcanic soil (Old Latium) on wh ...
,
Colli Euganei
The Euganean Hills ( it, Colli Euganei ) are a group of hills of volcanic origin that rise to heights of 300 to 600 m from the Padovan-Venetian plain a few km south of Padua. The ''Colli Euganei'' form the first Regional park established in the V ...
) and there are several areas at high risk of invasion.
Behaviour and ecology
The presence of the
avian malaria
Avian malaria is a parasitic disease of birds, caused by parasite species belonging to the genera ''Plasmodium'' and '' Hemoproteus'' (phylum Apicomplexa, class Haemosporidia, family Plasmoiidae). The disease is transmitted by a dipteran vector i ...
parasite has been found in the blood of this species.
Diet
This bird feeds on animal matter. It eats
fruit
In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering.
Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particul ...
s such as strawberries, ripened
papaya
The papaya (, ), papaw, () or pawpaw () is the plant species ''Carica papaya'', one of the 21 accepted species in the genus ''Carica'' of the family Caricaceae. It was first domesticated in Mesoamerica, within modern-day southern Mexico and C ...
,
guava
Guava () is a common tropical fruit cultivated in many tropical and subtropical regions. The common guava ''Psidium guajava'' (lemon guava, apple guava) is a small tree in the myrtle family (Myrtaceae), native to Mexico, Central America, the C ...
s and also various species of
Diptera
Flies are insects of the order Diptera, the name being derived from the Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwings having evolved into advanced ...
,
Mollusca
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estim ...
,
Lepidoptera
Lepidoptera ( ) is an order of insects that includes butterflies and moths (both are called lepidopterans). About 180,000 species of the Lepidoptera are described, in 126 families and 46 superfamilies, 10 percent of the total described specie ...
, and
Hymenoptera
Hymenoptera is a large order of insects, comprising the sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, in addition to over 2,000 extinct ones. Many of the species are parasitic.
Females typic ...
. Its food is usually gathered from foliage and dead wood and it usually searches for food in lower strata of vegetation.
Breeding
The leiothrix can usually be found in a group of about ten to thirty birds during the non-breeding season; however, during the breeding season the birds break off into pairs and become territorial. These birds have a
song
A song is a musical composition intended to be performed by the human voice. This is often done at distinct and fixed pitches (melodies) using patterns of sound and silence. Songs contain various forms, such as those including the repetitio ...
which consists of short powerful notes that are repeated continuously throughout the year but it is more persistent during the breeding season. This period usually lasts from early April until September and they are usually found around well watered areas. The males sing long complex songs with a wide array of syllables to attempt to attract the female.
The leiothrix is an open cup nester. The
nests
A nest is a structure built for certain animals to hold eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic materia ...
of the red-billed leiothrix are composed of dry leaves,
moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) ''sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornw ...
and
lichen
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship. Several nests are found between April and June and are placed within ten feet of the ground. Dense vegetation provides the shrub nesting species protection against
predator
Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill t ...
s.
The eggs of the leiothrix are found in clutches of two to four eggs with an average of three. They are broad and blunt in shape with some gloss on the outside and they also have a pale blue colour and red like brown spots that encircle the larger end of the eggs. The newly hatched birds have bright red skin and a rich orange red
gape
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for eating, preening, manipulating objects, killing prey, fighting, probing for food, ...
.
Gallery
File:Chakkimorh-5332-2.jpg, Chakkimorh,
Himachal Pradesh
Himachal Pradesh (; ; "Snow-laden Mountain Province") is a state in the northern part of India. Situated in the Western Himalayas, it is one of the thirteen mountain states and is characterized by an extreme landscape featuring several peaks ...
, India
File:Red-billed leiothrix.jpg, Red-billed leiothrix, Maui, Hawaii
File:Leiothrix lutea -Chester Zoo, England -two-8a.jpg, Two at Chester Zoo, England
File:Leiothrix lutea -Chester Zoo, Cheshire, England-8a.jpg, Male at Chester Zoo, England
File:Leiothrix lutea calipyga MHNT 227 Jiangsu Chine.jpg, Egg of ''L. l. calipyga'' MHNT