The citrine wagtail (''Motacilla citreola'') is a small songbird in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Motacillidae The wagtails, longclaws, and pipits are a family, Motacillidae, of small passerine birds with medium to long tails. Around 70 species occur in five genera. The longclaws are entirely restricted to the Afrotropics, and the wagtails are predominan ...

Etymology

The term ''citrine'', and the specific name ''citreola'', refers to its yellowish colouration.

Taxonomy

Its

systematics Biological systematics is the study of the diversification of living forms, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: cladograms, phylogenetic tre ...

phylogeny A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spec ...

and

taxonomy Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

are subject of considerable debate in the early 21st century. This is because this bird forms a

cryptic species complex In biology, a species complex is a group of closely related organisms that are so similar in appearance and other features that the boundaries between them are often unclear. The taxa in the complex may be able to hybridize readily with each oth ...

with the eastern (''M. tschutschensis '') and

western yellow wagtail The western yellow wagtail (''Motacilla flava'') is a small passerine in the wagtail family Motacillidae, which also includes the pipits and longclaws. This species breeds in much of temperate Europe and Asia. It is resident in the milder parts ...

(''M. flava''). Which of the many taxa in this group should properly refer to which

population Population typically refers to the number of people in a single area, whether it be a city or town, region, country, continent, or the world. Governments typically quantify the size of the resident population within their jurisdiction using a ...

is unlikely to be resolved in the immediate future. ''Motacilla'' is the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

name for the pied wagtail; although actually a diminutive of ''motare'', " to move about", from medieval times it led to the misunderstanding of ''cilla'' as "tail". The specific ''citreola'' is Latin for "lemon yellow".

Description

It is a slender, 15.5–17 cm long bird, with the long, constantly wagging tail characteristic of the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

'' Motacilla''. The adult male in breeding plumage is basically grey or black above, with white on the

remiges Flight feathers (''Pennae volatus'') are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges (), singular remex (), while those on the tail ...

, and bright yellow below and on the entire head except for the black nape. In winter plumage, its yellow underparts may be diluted by white, and the head is brownish with a yellowish

supercilium The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head.Dunn and Alderfer (2006), p. 10 Also ...

. Females look generally like washed-out versions of males in winter plumage.

Distribution

This species breeds in the central

Palearctic The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sibe ...

in wet meadows and

tundra In physical geography, tundra () is a type of biome where tree growth is hindered by frigid temperatures and short growing seasons. The term ''tundra'' comes through Russian (') from the Kildin Sámi word (') meaning "uplands", "treeless moun ...

. It migrates in winter to

South Asia South Asia is the southern subregion of Asia, which is defined in both geographical and ethno-cultural terms. The region consists of the countries of Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka.;;;;;;;; ...

, often to highland areas. Its range is expanding westwards, and it is a rare but increasing vagrant to western

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 ...

. Vagrants seem to extend the migration rather than straying

en route ''En route'' may refer to: * ''En Route'' (novel), an 1895 novel by Joris-Karl Huysmans * ''En Route'' (film), a 2004 German movie directed by Jan Krüger * En-route chart, in aeronautics * enRoute (credit card), Air Canada's credit card divisio ...

; in

Bhutan Bhutan (; dz, འབྲུག་ཡུལ་, Druk Yul ), officially the Kingdom of Bhutan,), is a landlocked country in South Asia. It is situated in the Eastern Himalayas, between China in the north and India in the south. A mountainous ...

, for example, though along one of the species' migration flyways, the citrine wagtail has been recorded as an extremely rare passer-by rather than staying even for a few days or weeks.

Ecology

It is an

insectivorous A robber fly eating a hoverfly An insectivore is a carnivorous animal or plant that eats insects. An alternative term is entomophage, which can also refer to the human practice of eating insects. The first vertebrate insectivores were ...

bird Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweigh ...

of open country near water, such as wet meadows and bogs, and nests on the ground, laying 4–5 speckled eggs.

Gallery

File:Citrine wagtail I IMG 8326.jpg, Female in breeding plumage, Narenderpur near

Kolkata Kolkata (, or , ; also known as Calcutta , the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River west of the border with Bangladesh. It is the primary business, comme ...

(

West Bengal West Bengal (, Bengali: ''Poshchim Bongo'', , abbr. WB) is a state in the eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabitants within an area of . West Bengal is the fourt ...

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

) File:Citrine Wagtail I IMG 8316.jpg, Juvenile in Kolkata (West Bengal, India) File:Citrine wagtail I IMG 5467.jpg, Immature in first-winter plumage
Joka, Kolkata (West Bengal, India) File:Citrine Wagtail (Moticilla citreola) 12-10-2006 1-29-57 PM.JPG, Wintering bird in Ras al Khor Bird Sanctuary (

Dubai Dubai (, ; ar, دبي, translit=Dubayy, , ) is the most populous city in the United Arab Emirates (UAE) and the capital of the Emirate of Dubai, the most populated of the 7 emirates of the United Arab Emirates.The Government and Politics of ...

UAE The United Arab Emirates (UAE; ar, اَلْإِمَارَات الْعَرَبِيَة الْمُتَحِدَة ), or simply the Emirates ( ar, الِْإمَارَات ), is a country in Western Asia (The Middle East). It is located at th ...

) File:Citrine Wagtail Motacilla citreola.jpg, Citrine wagtail ''Motacilla citreola'' File:Citrine Wagtail at Nalsarovar Bird Sanctuary.jpg, Citrine Wagtail at Nalsarovar Bird Sanctuary

References

External links

* {{Taxonbar, from=Q206540 Birds described in 1776 Birds of Eurasia Motacilla Pipits and wagtails