The yellowhammer ( Emberiza citrinella) is a passerine bird in the Emberiza family that is native to Palearctic and has been introduced to New Zealand and Australia. Most European birds remain in the breeding range year-round, but the eastern subspecies is partially bird migration, with much of the population wintering further south. The male yellowhammer has a bright yellow head, streaked brown back, chestnut rump, and yellow under parts. Other plumages are duller versions of the same pattern. The yellowhammer is common in open areas with some shrubs or trees, and forms small flocks in winter. Its song has a rhythm like "A little bit of bread and no cheese". The song is very similar to that of its closest relative, the pine bunting, with which it interbreeds.
Breeding commences mainly in April and May, with the female building a lined cup nest in a concealed location on or near the ground. The three to five eggs are patterned with a mesh of fine dark lines, giving rise to the old name for the bird of "scribble lark" or "writing lark". The female incubates the eggs for 12–14 days prior to hatching, and broods the altricial downy chicks until they fledge 11–13 days later. Both adults feed the chick in the nest and raise two or three broods each year. The nest may be raided by rodents or corvidae, and the adults are hunted by birds of prey. Yellowhammers feed on the ground, usually in flocks outside the breeding season. Their diet is mainly seeds, supplemented by in the breeding season. Changes to agricultural practices have led to population declines in western Europe, but its large numbers and huge range mean that the yellowhammer is classed as being of least concern by the International Union for Conservation of Nature.
This conspicuous yellow bird has inspired poems by Robert Burns and John Clare, and its characteristic song has influenced musical works by Beethoven and Olivier Messiaen. Children's writer Enid Blyton helped to popularise the standard English representation of the song.
The bird family Emberizidae contains a single genus Emberiza, with around 40 members, that are confined to the Old World. Within its genus, the yellowhammer is most closely related to the pine bunting, with which it forms a superspecies; they have at times been considered as one species. The white-capped and are also near relatives of the species pair. Where their ranges meet, the yellowhammer and pine bunting interbreed; the yellowhammer is dominant, and the hybrid zone is moving further east.
After breeding, adults have a complete moulting, which takes at least eight weeks; males acquire more yellow in the plumage each time they moult. Juveniles have a partial moult not long after fledging, replacing the head, body, and some .
Differences between the subspecies are small and geographically gradual. On average, the male of E. c. caliginosa is slightly smaller and darker than the same sex of the nominate subspecies, and also has more streaking on its back, a greenish tint to the yellow of the head and more chestnut on the flanks. The male of the eastern form, E. c. erythrogenys, is paler and less streaked than E. c. citrinella. Its flanks, undertail and wing bars are usually whiter, and its crown and throat are brighter yellow.Olsson et al. (1995) pp. 107–110. Distinguishing females of the three subspecies using plumage features is not usually possible.Olsson et al. (1995) p. 24.
Females and juveniles, especially of the pale eastern subspecies, E. c. erythrogenys, may be confused with pine buntings, but they always have a yellow tint to their plumage, a paler rufous rump, and more uniform upperparts than that species.Olsson et al. (1995) pp. 111–114. Young and female yellowhammers can be distinguished from cirl buntings by the grey-brown rump of the latter species. Male hybrids with pine buntings are typically white-faced and have some yellow on the head, under parts or , but females are usually indistinguishable from yellowhammers.Porter & Aspinall (2011) p. 208.
Yellowhammer males learn their songs from their fathers, and over time, regional dialects have developed, with minor differences to the conclusion of the basic song; all are mutually recognised by birds from different areas. Each male has an individual repertoire of song variants within its regional dialect; females tend to mate with males that share their dialect, and prefer those with the largest repertoires.
The pine bunting and yellowhammer are so closely related that each responds to the other's song. The male yellowhammer's song is more attractive to females, and is one reason for the dominance of that species where the ranges overlap.
Most European yellowhammers winter within their breeding range, only the far north being vacated, although some birds move south of their breeding range in Spain, Italy, and other Mediterranean countries. Distances travelled can be up to for northern birds. Asian birds are more strongly bird migration, deserting much of the north to winter in Iraq, Iran, and southern Central Asia. The yellowhammer has occurred as a vagrant in the United Arab Emirates, Egypt, Kuwait, Morocco, Malta, the Himalayas (winter vagrant from northern Afghanistan to central NepalRasmussen (2005) p. 552.), the Balearic Islands, Iceland, and the Faroe Islands.
Yellowhammers of the British and Irish race, E. c. caliginosa, were introduced to New Zealand by local acclimatisation societies in 1862,Oliver (1955) p. 635. and soon spread over the main islands. They sometimes visit New Zealand's subantarctic islands, although rarely staying to breed, and have reached Australia's Lord Howe Island on a number of occasions. At the beginning of the 20th century, this bunting was seen as a serious agricultural pest in its adopted country.Lever (2005) p. 268.
Populations of yellowhammer have also been introduced to the Falkland Islands and South Africa.Long, John L. (1981). Introduced Birds of the World. Agricultural Protection Board of Western Australia. pp. 21–493
The yellowhammer is a bird of dry, open country, preferably with a range of vegetation types and some trees from which to sing. It is absent from urban areas, forests, and wetlands. Probably originally found at forest edges and large clearing, it has benefited from traditional agriculture, which created extensive open areas with hedges and clumps of trees.
The clutch is usually three to five whitish eggs, typically patterned with a network of fine, dark lines. The eggs average in size and weigh , of which 6% is shell. The female incubates the eggs for 12–14 days to hatching, and broods the altricial, downy chicks until they fledge 11–13 days later. Both adults feed the chick in the nest and two or three broods are raised each year.
The adult annual survival rate in the UK is around 54%, and that for juveniles in their first year is 53%. The typical lifespan is three years, although records from Great Britain and Germany indicate birds surviving more than 13 years.
The yellowhammer adds to its diet in the breeding season, particularly as food for its growing chicks. A wide range of species is taken, including , , Fly, , , , spiders, and . During the first few days, chicks are exclusively fed invertebrate prey, but from day three they are also fed cereal grains, which the chicks can digest efficiently. This is thought to be intentional by the parents to allow the nestlings to adjust their physiology to eating seed.
Thirteen species of in the genera Ceratophyllus and Dasypsyllus have been found on this bunting, and internal parasites include Ascaridia galli.Atkinson et al. (2008) p. 401. The yellowhammer may carry blood parasites such as Haemoproteus coatneyi. Males with high parasite levels produced fewer offspring (there is no such effect for females), and tend to be less brightly coloured. The striking plumage of the male may therefore have arisen as a signal of fitness to breed. Yellowhammers infected with Haemoproteus may have lower winter survival rates due to a tendency to having shorter wings.
Populations have declined in recent decades in western Europe, including the British Isles, Belgium, the Netherlands, Austria, and Italy. The yellowhammer is a red-list (severely declining) species in Ireland and the UK. In 2016 the species went extinct on the Isle of Man. In eastern Europe, numbers appear to be stable, although the trend in Russia is unknown. Changes to agricultural practices are thought to be responsible for reduced breeding densities. The introduced population in New Zealand has been very successful, with breeding densities much higher than in the UK.Komdeur, Jan; Hammers, Martin "Failed introductions: finches from outside Australia" in Prins & Gordon (2014) p. 330.
Enid Blyton helped to popularize the bird's song as "little bit of bread and no cheese" in books such as The Ship of Adventure and Five Go Off in a Caravan, and wrote a poem called "The Yellow-hammer".Blyton (2008) p. 164.
Beethoven's student, Carl Czerny, and biographer Anton Schindler, both suggested that the composer got the idea for the first four notes of his 5th symphony from the yellowhammer's call, although more likely the opening of the 4th Piano Concerto was actually the work in question.Thayer (1991) p. 437. Beethoven also used the yellowhammer theme in two piano sonatas, no. 21 in C major (the "Waldstein", Op.53) and No. 23 in F minor (the "Appassionata", Op.57).
Olivier Messiaen often used birdsong as an inspiration for his music, and the yellowhammer features in Chronochromie,Dingle & Fallon (2013) pp. 155–158. Catalogue d'oiseaux,Shenton (2008) pp. 61–63. La fauvette des jardins and Méditations sur le mystère de la Sainte Trinité,Bruhn (2008) p. 144.Dingle & Fallon (2013) pp. 170–171. appearing in four movements of the last piece.
An old legend links the yellowhammer to the devil. Its tongue was supposed to bear a drop of his blood, and the intricate pattern on the eggs was said to carry a concealed, possibly evil, message; these satanic associations sometimes led to the persecution of the bird. The unusual appearance of the eggs also led to the alternative names of scribble lark or scribble jack.
Subspecies
Description
Voice
Distribution and habitat
Behaviour
Breeding
Feeding
Predators and parasites
Status and conservation
In culture
Cited texts
External links
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