| Redwing | |
|---|---|
 | |
| Adult T. i. iliacus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Turdidae |
| Genus: | Turdus |
| Species: | T. iliacus |
| Binomial name | |
| Turdus iliacus | |
 | |
The redwing (Turdus iliacus) is a bird in the thrush family, Turdidae, native to Europe and the Palearctic, slightly smaller than the related song thrush.
This species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae under its current scientific name. [2]
The English name derives from the bird's red underwing. It is not closely related to the red-winged blackbird, a North American species sometimes nicknamed "redwing", which is an icterid, not a thrush. [3] The binomial name derives from the Latin words turdus, "thrush", and ile "flank". [4]
About 65 species of medium to large thrushes are in the genus Turdus, characterised by rounded heads, longish, pointed wings, and usually melodious songs. Although two European thrushes, the song thrush and mistle thrush, are early offshoots from the Eurasian lineage of Turdus thrushes after they spread north from Africa, the redwing is descended from ancestors that had colonised the Caribbean islands from Africa and subsequently reached Europe from there. [5]
The redwing has two subspecies: [6] [7] [8]
The thrush is 20–24 cm long with a wingspan of 33–34.5 cm and a weight of 50–75 g. The sexes are similar, with plain brown backs and with dark brown spots on the white underparts. The most striking identification features are the red flanks and underwing, and the creamy white stripe above the eye. [6] [7] [8] Adults moult between June and September, which means that some start to replace their flight feathers while still feeding young. [9]
The male has a varied short song, and a whistling flight call. Redwings show a distinct dialectic variation in song, having a considerable similarity in song patterns among birds within a local population. [10]
The Redwing song consists of a number of introductory elements of descending or ascending frequency. These elements may be of pure tonal quality, or of a more harsh quality (varying degrees of frequency modulations or "trills"). After the introductory elements, a fast and more complex song pattern often follows. It is the introductory elements which show a geographic variation. The boundaries of any given dialect may vary but in a rural and forested environment in Norway the average size of these dialect areas is around 41.5 km2. [10]
The redwing thrush breeds in northern regions of Europe and the Palearctic, from Iceland south to northernmost Scotland, and east through Scandinavia, the Baltic States, northern Poland and Belarus, and through most of Russia to about 165°E in Chukotka Autonomous Okrug. In recent years it has expanded its range slightly, both in eastern Europe where it now breeds south into northern Ukraine, and in southern Greenland, where the Qaqortoq area was colonised in 1990–1991. [6] [7] [8]
It is often replaced by the related ring ouzel in areas of higher altitude. [11]
The thrush is migratory, wintering in western, central and southern Europe, north-west Africa, and south-west Asia east to northern Iran. Birds in some parts of the west of the breeding range (particularly south-western Norway) may be resident, not migrating at all, while those in the far east of the range migrate at least 6,500–7,000 km to reach their wintering grounds. [6] [7] [8]
There are multiple records of vagrants from the north-east coast of North America, as well as two sightings on the north-west coast (one in Washington in 2005, and one in Seward, Alaska in November 2011). [8]
While migrating and wintering, redwing thrushes often form a loose flock. The size of the flock varies between 10 and at least 200 birds. They often feed together with fieldfares, common blackbirds and starlings. Sometimes, they will also feed alongside mistle thrushes, song thrushes, and ring ouzels. [6] [7] [8] Unlike the song thrush, the more nomadic redwing does not tend to return regularly to the same wintering areas. [12]
Migration occurs between autumn and early winter, and the birds often move at night. Oftentimes, they may make a "Tseep" contact call that can carry a long distance. [12]
The redwing thrush breeds in conifer and birch forests, and the tundra. Redwings nest in shrubs or on the ground, laying four to six eggs in a neat nest. The eggs are typically 2.6 x 1.9 centimetres in size and weigh 4.6 grammes, of which 5% is shell, [4] and which hatch after 12–13 days. The chicks fledge 12–15 days after hatching, but the young remain dependent on their parents for another 14 days before they leave the nest. [6] [7] [8]
The thrush is omnivorous, eating a wide range of insects and earthworms all year, supplemented by berries in autumn and winter, particularly of rowan Sorbus aucuparia and hawthorn Crataegus monogyna. [6] [7] [8]
A Russian study of blood parasites showed that many of the fieldfares, redwings and song thrushes sampled carried haematozoans, particularly Haemoproteus and Trypanosoma . [13]
The redwing has an extensive range, estimated at 10 million square kilometres (3.8 million square miles), and an estimated population of 26 to 40 million individuals in Europe alone. The European population forms approximately 40% of the global population, thus the very preliminary estimate of the global population is 98 to 151 million individuals. The species is believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e., declining more than 30% in ten years or three generations), and is therefore precautionarily uplisted to near threatened. [1] Numbers can be adversely affected by severe winters, which may cause heavy mortality, and cold wet summers, which reduce breeding success. [7]
The common blackbird is a species of true thrush. It is also called the Eurasian blackbird, or simply the blackbird where this does not lead to confusion with a similar-looking local species. It breeds in Europe, western Asia, and North Africa, and has been introduced to Australia and New Zealand. It has a number of subspecies across its large range; a few former Asian subspecies are now widely treated as separate species. Depending on latitude, the common blackbird may be resident, partially migratory, or fully migratory.
The song thrush is a thrush that breeds across the West Palearctic. It has brown upper-parts and black-spotted cream or buff underparts and has three recognised subspecies. Its distinctive song, which has repeated musical phrases, has frequently been referred to in poetry.
The ring ouzel is a mainly European member of the thrush family Turdidae. It is a medium-sized thrush, 23–24 centimetres (9.1–9.4 in) in length and weighing 90–138 grams (3.2–4.9 oz). The male is predominantly black with a conspicuous white crescent across its breast. Females are browner and duller than males, and young birds may lack the pale chest markings altogether. In all but the northernmost part of its range, this is a high-altitude species, with three races breeding in mountains from Ireland east to Iran. It breeds in open mountain areas with some trees or shrubs, the latter often including heather, conifers, beech, hairy alpenrose or juniper. It is a migratory bird, leaving the breeding areas to winter in southern Europe, North Africa and Turkey, typically in mountains with juniper bushes. The typical clutch is 3–6 brown-flecked pale blue or greenish-blue eggs. They are incubated almost entirely by the female, with hatching normally occurring after 13 days. The altricial, downy chicks fledge in another 14 days and are dependent on their parents for about 12 days after fledging.
The mistle thrush, also spelled missel thrush, is a bird common to much of Europe, temperate Asia and North Africa. It is a year-round resident in a large part of its range, but northern and eastern populations migrate south for the winter, often in small flocks. It is a large thrush with pale grey-brown upper parts, a greyish-white chin and throat, and black spots on its pale yellow and off-white under parts. The sexes are similar in plumage, and its three subspecies show only minimal differences. The male has a loud, far-carrying song which is delivered even in wet and windy weather, earning the bird the old name of stormcock.
The fieldfare is a member of the thrush family Turdidae. It breeds in woodland and scrub in northern Europe and across the Palearctic. It is strongly migratory, with many northern birds moving south during the winter. It is a very rare breeder in the British Isles, but winters in large numbers in the United Kingdom, Southern Europe, North Africa and the Middle East. It is omnivorous, eating a wide range of molluscs, insects and earthworms in the summer, and berries, grain and seeds in the winter.
The willow warbler is a very common and widespread leaf warbler which breeds throughout northern and temperate Europe and the Palearctic, from Ireland east to the Anadyr River basin in eastern Siberia. It is strongly migratory, with almost all of the population wintering in sub-Saharan Africa.
True thrushes are medium-sized mostly insectivorous or omnivorous birds in the genus Turdus of the wider thrush family, Turdidae. The genus name Turdus is Latin for "thrush". The term "thrush" is used for many other birds of the family Turdidae as well as for a number of species belonging to several other families.
The green sandpiper is a small wader (shorebird) of the Old World.
The wood sandpiper is a small wader belonging to the sandpiper family Scolopacidae. A Eurasian species, it is the smallest of the shanks, a genus of mid-sized, long-legged waders that largely inhabit freshwater and wetland environments, as opposed to the maritime or coastal habitats of other, similar species.
The pied avocet is a large black and white wader in the avocet and stilt family, Recurvirostridae. They breed in temperate Europe and across the Palearctic to Central Asia then on to the Russian Far East. It is a migratory species and most winter in Africa or southern Asia. Some remain to winter in the mildest parts of their range, for example in southern Spain and southern England. The pied avocet is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
The meadow pipit is a small passerine bird, which breeds in much of the Palearctic, from southeastern Greenland and Iceland east to just east of the Ural Mountains in Russia, and south to central France and Romania; an isolated population also occurs in the Caucasus Mountains. It is migratory over most of its range, wintering in southern Europe, North Africa, and south-western Asia, but is resident year-round in western Europe, though even here many birds move to the coast or lowlands in winter.
The black wheatear is a wheatear, a small passerine bird in the Old World flycatcher family Muscicapidae. It is found in the Iberian Peninsula and western North Africa.
The eyebrowed thrush is a member of the thrush family Turdidae. It breeds in dense coniferous forest and taiga eastwards from Siberia and Mongolia to Japan. It is strongly migratory, wintering south to China and Southeast Asia. It is a rare vagrant to western Europe.
The dusky thrush is a member of the thrush family which breeds eastwards from central Siberia to Kamchatka wintering to Japan, South China and Myanmar. It is closely related to the more southerly breeding Naumann's thrush T. naumanni; the two have often been regarded as conspecific. The scientific name comes from Latin Turdus, "thrush" and Ancient Greek eunomos, "orderly".
The pale thrush is a passerine bird of the eastern Palearctic belonging to the genus Turdus in the thrush family Turdidae. It is closely related to the eye-browed thrush and grey-backed thrush.
Prioksko-Terrasny Nature Biosphere Reserve is one of Russia's smallest zapovedniks, sprawling over an area of 5,000 hectares along the left bank of the Oka River in the Serpukhov District of Moskva Oblast. It was established in 1945 as part of the Moscow Nature Reserve and is home to 900 plant species, 130 bird species, and 54 mammal species. A wisent nursery was established in 1948 to populate the region with European bison from the Belovezhskaya Pushcha and Western Caucasus. There is also a small herd of American bison.
In the 10th edition of Systema Naturae, published in 1758, the Swedish naturalist Carl Linnaeus described 554 species of bird and gave each a binomial name.
Naumann's thrush is a species of the thrush family Turdidae which breeds eastwards from central Siberia to North Manchuria, Amurland and Sakhalin. It is closely related to the more northerly breeding dusky thrush T. eunomus; the two have often been regarded as conspecific.
The black-throated thrush is a passerine bird in the thrush family. It is sometimes regarded as one subspecies of a polytypic species, "dark-throated thrush", red-throated thrush then being the other subspecies. More recent treatments regard the two as separate species.
The Pannonian mixed forests is a temperate broadleaf and mixed forests ecoregion in Europe. It covers an area of 307,720 km2 in all of Hungary, most of Slovakia, about half of Croatia and Slovenia, around a third of Bosnia and Herzegovina, Romania, and Serbia, and minor parts of Austria, Czech Republic, and Ukraine.
T. alis subtus flavescentibus, rectricibus tribus lateralibus apice utrinque albis.
