The spotless starling (''Sturnus unicolor'') is a

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 are distinguished from other orders of birds by t ...

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 ...

in the

starling Starlings are small to medium-sized passerine birds in the family Sturnidae. The Sturnidae are named for the genus ''Sturnus'', which in turn comes from the Latin word for starling, ''sturnus''. Many Asian species, particularly the larger ones, ...

family, Sturnidae. It is closely related to the

common starling The common starling or European starling (''Sturnus vulgaris''), also known simply as the starling in Great Britain and Ireland, is a medium-sized passerine bird in the starling family, Sturnidae. It is about long and has glossy black plumage ...

(''S. vulgaris''), but has a much more restricted range, confined to the

Iberian Peninsula The Iberian Peninsula (), ** * Aragonese and Occitan: ''Peninsula Iberica'' ** ** * french: Péninsule Ibérique * mwl, Península Eibérica * eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defi ...

, Northwest

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

, southernmost

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

, and the islands of

Sicily (man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographi ...

Corsica Corsica ( , Upper , Southern ; it, Corsica; ; french: Corse ; lij, Còrsega; sc, Còssiga) is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of ...

and

Sardinia Sardinia ( ; it, Sardegna, label=Italian, Corsican and Tabarchino ; sc, Sardigna , sdc, Sardhigna; french: Sardaigne; sdn, Saldigna; ca, Sardenya, label=Algherese and Catalan) is the second-largest island in the Mediterranean Sea, after ...

. It is largely

non-migratory Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by ...

.Hagemeijer, W. J. M., & Blair, M. J., eds. (1997). ''

The EBCC Atlas of European Breeding Birds ''The EBCC Atlas of European Breeding Birds - their distribution and abundance'' () is an ornithological atlas published for the European Bird Census Council by T & A D Poyser in 1997. Its editors were Ward J. M. Hagemeijer and Michael J. Blai ...

'' pp. 690. Poyser, London .

Taxonomy and systematics

Subsequent to the recent split of the genus ''

Sturnus ''Sturnus'' is a genus of starlings. As discussed below, the taxonomy of this group is complex, and other authorities differ considerably in which species they place in this genus, and in the species boundaries within ''Sturnus''. The genus name ...

'', this species and the common starling are the only species retained in the genus. Hybrids with the common starling are found occasionally where the breeding ranges overlap in northeastern Spain.

Description

The adult spotless starling is very similar to the common starling, but marginally larger (21–23 cm length; 70–100 g weight), and has darker, oily-looking black plumage, slightly purple- or green-glossed in bright light, which is entirely spotless in spring and summer, and only with very small pale spots in winter plumage, formed by the pale tips of the feathers. It also differs in having conspicuously longer throat feathers (twice the length of those on common starlings), forming a shaggy "beard" which is particularly obvious when the bird is singing. Its legs are bright pink. In summer, the bill is yellow with a bluish base in males and a pinkish base in females; in winter, it is duller, often blackish. Young birds are dull brown, darker than young common starlings, and have a black bill and brown legs.Blasco-Zumeta, J., & Heinze, G.-M. (undated). Laboratorio Virtual Ibercaj
417 Spotless Starling
/ref> Confusion with the common starling is particularly easy during the winter, when common starlings are abundant throughout the spotless starling's range, but also in summer where their breeding ranges overlap in northeastern Spain and the far south of France. It can also be confused with the

common blackbird The common blackbird (''Turdus merula'') is a species of true thrush. It is also called the Eurasian blackbird (especially in North America, to distinguish it from the unrelated New World blackbirds), or simply the blackbird where this does not ...

(''Turdus merula''), which differs most obviously in its longer tail and lack of plumage gloss. Like the common starling, it walks rather than hops, and has a strong direct flight, looking triangular-winged and short-tailed. It is a noisy bird and a good mimic; its calls are similar to the common starling's, but louder.

Distribution and habitat

The spotless starling uses a wide range of habitats and can be found in any reasonably open environment, from farmland and

olive The olive, botanical name ''Olea europaea'', meaning 'European olive' in Latin, is a species of small tree or shrub in the family Oleaceae, found traditionally in the Mediterranean Basin. When in shrub form, it is known as ''Olea europaea'' ...

groves to human habitation. The highest population densities are in open grazed holm oak woods, and in urban habitats such as

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, where it is common.The Gibraltar Bird List
/ref> The population has grown in recent decades with a northward expansion in range, spreading to the whole of Spain (previously absent from the northeast) between 1950 and 1980, and colonising locally along the southern coast of mainland France since 1983. Like its more common relative, it is an omnivore, taking a wide variety of invertebrates, berries, and human-provided scraps. It is gregarious, forming sizeable flocks, often mixed with common starlings, of up to 100,000 in winter. Like most starlings, it is a cavity-nesting species, breeding in tree holes, buildings and in cliff crevices. It typically lays three to five eggs.

Gallery

File:Spotless starling (Sturnus unicolor) display composite.jpg, Mating display of raising feathers File:Sturnus unicolor MHNT.ZOO.2010.11.215.Andalousie.jpg, Eggs of '' Sturnus unicolor'' - MHNT

References

External links

Ageing and Sexing (PDF; 4.5 MB) by Javier Blasco-Zumeta & Gerd-Michael Heinze
{{Taxonbar, from=Q836833 spotless starling spotless starling Birds of Southern Europe Birds of North Africa Fauna of the Iberian Peninsula spotless starling