Coal tit

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Coal tit
Coal tit UK09.JPG
Adult British coal tit, P. a. britannicus
(note greenish-grey back)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Paridae
Genus: Periparus
Species:
P. ater
Binomial name
Periparus ater
PeriparusAterIUCN2018 2.png
Range of P. ater
  Resident
  Non-breeding
Synonyms

Parus aterLinnaeus, 1758

The coal tit (Periparus ater), is a small passerine bird in the tit family, Paridae. It is a widespread and common resident breeder in forests throughout the temperate to subtropical Palearctic, including North Africa. The black-crested tit is now usually included in this species.

Contents

Taxonomy and systematics

This species was first described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae. Linnaeus' primary reference was his earlier Fauna Svecica, whose cumbersome pre-binomial name Parus capite nigro: vertice albo, dorso cinereo, pectore albo ("black-headed tit with white nape, ash-grey back, white breast") became the much simpler yet no less unequivocal Parus ater. This name – meaning "dusky-black tit" – was simply adopted from older ornithological textbooks, ultimately going back to Conrad Gessner's 1555 Historia animalium . He gave no type locality except "Europe", but his original description refers to the population inhabiting Sweden (which is consequently included in the nominate subspecies today). [2] The current genus name, is Ancient Greek peri plus the pre-existing genus Parus . The specific ater is Latin for "dull black". [3]

The colourful great tit (Parus major) with its bold wing-stripe. Before binomial nomenclature, naturalists found the folk taxonomy of this species and the coal tit quite confusing. Great-Tit.jpg
The colourful great tit (Parus major) with its bold wing-stripe. Before binomial nomenclature, naturalists found the folk taxonomy of this species and the coal tit quite confusing.

Gessner also notes that the coal tit was known as Kohlmeiß in German – the literal equivalent of its English name, though in its modern orthography Kohlmeise it refers to the great tit (Parus major). That bird was in Gessner's day usually called Spiegelmeiß ("multicoloured tit" [4] ), Brandtmeiß ("burnt tit") or grosse Meiß ("great tit") in German. Kölmeyß was attested for P. major by William Turner, but Turner does not list P. ater at all, while Gessner notes that his hunters always used Kohlmeiß for the present species. However, this has since changed, and the modern German name of P. ater is Tannenmeise ("fir tit"), after a typical habitat. This name is attested (as Tannen-Maise) by Johann Leonhard Frisch in the early 18th century already, who furthermore records that P. ater was also called Kleine Kohl-Maise ("small coal tit") whereas Kohl-Maise referred unequivocally to P. major. Frisch collected his data in the Berlin region, where the German dialect was quite different from that spoken by Gessner's Alemannic sources 200 years earlier, and heavily influenced by Middle Low German – the language of the northern German sources of Turner. Regarding that, Tanne is derived from the Old Saxon danna, and thus had spread through the German dialect continuum from north to south.  [5]

Most authorities still treat the coal tit in the subgenus Periparus, but the American Ornithologists' Union considers Periparus a distinct genus. This is supported by mtDNA cytochrome b sequence analysis; Periparus seems to be closer to the Poecile tits and chickadees than to the great tit and its relatives. Thus, it belongs to the more advanced Paridae, in which the bright plumage of the more basal lineages is dulled down apomorphically. [6] [ needs update ]

Illustration of Parus ater cypriotes by John Gerrard Keulemans ParusCypriotesKeulemans.jpg
Illustration of Parus ater cypriotes by John Gerrard Keulemans

In addition, the same data suggest that this species is paraphyletic in regard to the closely related and parapatric spot-winged tit (P. melanolophus) from South Asia, which looks like a slightly crested, darker version of P. ater. Consequently, the spot-winged tit might have to be included in P. ater, or some coal tits could be considered a distinct species. As occasional hybridization has been recorded between the two, mtDNA alone (which is inherited only from the mother) is insufficient to determine whether hybrid gene flow or another trivial cause (such as incomplete lineage sorting) obfuscates the actual relationships, or whether taxonomic rearrangement is indeed required. With the range of these titmice encircling the Himalayas, without further study it cannot even be excluded that they constitute a ring species – with gene flow occurring in Nepal but not in Afghanistan – as has been shown for other passerines in the same region. [6] [ needs update ]

Subspecies

A number of coal tit subspecies are distinguished. The differences in colouration are quite pronounced in some of them, while their differences in size are more subtle. Coal tits from Asia follow Bergmann's rule, being larger in colder regions; those from further west, however, do not, as the birds from the uplands around the Mediterranean are larger than those from northern Europe. Across its range, tail length in relation to body length increases along a cline running from southwest to northeast. [7]

The British race P. a. britannicus has an olive hue to its brownish-grey back plumage, distinguishing it from the continental European nominate subspecies P. a. ater and P. a. abietum[ verification needed ] in which the back is bluish grey without a hint of green or brown. The Irish race P. a. hibernicus is distinguished from britannicus by the pale sulphur-yellow cheeks, breast and belly. It also has a paler rump (due to light fringes of the uppertail coverts) and a larger bill than its relatives from Britain and the Continent. [8]

The North African race P. a. ledouci has yellow underparts and cheeks, and the Cypriot P. a. cypriotes has a buff tinge to its upper parts, and deep buff underparts. Asian subspecies are generally rather dusky brownish except for the black-and-white head; [7] they include among others P. a. michalowskii of the Caucasus, P. a. phaeonotus of Iran, or the Himalayan coal tit [9] P. a. aemodius of southwestern China.

Description

Periparus ater filmed in Tokyo, Japan

The coal tit is 10–11.5 cm in length, and has a distinctive large white nape spot on its black head. [10] The head, throat and neck of the adult are glossy blue-black, setting off the off-white sides of the face (tinged grey to yellow depending on subspecies) and the brilliant white nape; the white tips of the wing coverts appear as two wingbars. The underparts are whitish shading through buff to rufous on the flanks. The bill is black, the legs lead-coloured, and irides dark brown.

The young birds in juvenile plumage are duller than the adults, lacking gloss on the black head, and with the white of nape and cheeks tinged with yellow. [10]

While searching for food, coal tit flocks keep contact with incessant short dee or see-see calls. The species' song – if "song" it can be called – is a strident if-he, if-he, if-he, heard most frequently from January to June, but also in autumn. The song resembles that of the great tit, but much faster and higher in pitch. [11] One variant of this song ends with a sharp ichi. North African birds also have a currr call similar to that of the crested tit (Lophophanes cristatus) which is not found in Africa.

Behaviour and ecology

Eggs, Collection Museum Wiesbaden Parus ater MWNH 2286.JPG
Eggs, Collection Museum Wiesbaden

It is typically a bird of temperate humid conifer forest, but apart from that shows little habitat specificity. In Bhutan for example coal tits are fairly common residents above the subtropical zone, at about 3,000–3,800 m ASL, and are found in forests dominated by Bhutan fir (Abies densa) as well as in those characterized by Himalayan hemlock (Tsuga dumosa) and rhododendrons. [12]

The coal tit is an all-year resident throughout almost all range, making only local movements in response to particularly severe weather; only the Siberian birds have a more regular migration. Very rarely, vagrants may cross longer distances; for example the nominate subspecies of continental Europe was recorded in Ireland once in 1960 and once before that, but apparently not since then.

Coal tits will form small flocks in winter with other tits. This species resembles other tits in acrobatic skill and restless activity, though it more frequently pitches on a trunk, and in little hops resembles a treecreeper (Certhia). Its food is similar to that of the others; it is keen on beechmast, picks out the seeds from fir (Abies) and larch (Larix) cones, and joins Carduelis redpolls and siskins in alders (Alnus) and birches (Betula). It will also visit gardens to feed on a variety of foods put out, particularly sunflower seeds.

Coal tits in the laboratory prefer to forage at a variable feeding site when they are in a negative energy budget. [13] They increase evening body mass in response to tawny owl calls. [14] After dawn the coal tits increases body mass as soon as possible if food is obtained at a low rate, increasing body mass exponentially until an inflection point when the increase of body mass is slower. [15] The inflection point of the body mass trajectory is 16.7% delayed compared to a high food availability. [15] Subordinate coal tits are excluded from feeding sites by dominants more often in the early morning than in the rest of the day, and they showed more variability in daily mass gain and body mass at dawn than dominant coal tits. [16] In winter, the red blood cells of coal tits have been shown to contain more mitochondria, which consume oxygen and produce heat. [17] [18]

Being common and widespread, the coal tit is not considered a threatened species by the IUCN. [19]

The coal tit has the dubious distinction of having the largest number of bird fleas ( Ceratophyllus gallinae ) reported from a single nest, 5,754 fleas. [20]

Breeding

A favourite nesting site is a hole in a rotting tree-stump, often low down, and the nest is deep within the hole; holes in the ground, burrows of mice or rabbits, chinks between the stones in walls, old nests of Pica magpies or other large birds, and squirrel dreys are also occupied. The materials, moss, hair and grass, are closely felted together, and rabbit fur or feathers added for lining. Seven to eleven red-spotted white eggs are laid, usually in May; this species breeds usually once per year.

See also

Footnotes

  1. ↑ BirdLife International (2017). "Periparus ater". IUCN Red List of Threatened Species . 2017: e.T22735965A118835425. doi: 10.2305/IUCN.UK.2017-3.RLTS.T22735965A118835425.en . Retrieved 19 November 2021.
  2. ↑ Gessner (1555): pp.616, Linnaeus (1746, 1758)
  3. ↑ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp.  58, 298. ISBN   978-1-4081-2501-4.
  4. ↑ Literally "mirror tit" (though its feathers are not iridescent), perhaps rather "wing-stripe tit", as in German ornithology Spiegel means a wing-stripe or -patch. The interpretation referring to its colorful plumage, though somewhat unusual, is the one given by Gesner however: a colorum pulchritudine quibus distinguitur – "for the beauty of its colors, which distinguish it"
  5. ↑ Turner (1544a,b), Gessner (1555): pp.615–616, Frisch (1720[ verification needed ]), Linnaeus (1758)
  6. 1 2 Gill et al. (2005)
  7. 1 2 Snow (1954)
  8. ↑ BI [2009]
  9. ↑ Bangs (1932)
  10. 1 2 Svensson, Lars; Mullarney, Killian; Zetterström, Dan; Graszka-Petrykowski, Dariusz; Stawarczyk, Tadeusz (2023). Ptaki Europy i obszaru śródziemnomorskiego. Przewodnik Collinsa (Wydanie III, poprawione i zaktualizowane ed.). Warszawa: Multico Oficyna Wydawnicza. p. 358,359. ISBN   978-83-7763-647-3.
  11. ↑ A Field Guide to the Birds of Korea (2005). ISBN   89-951415-3-0
  12. ↑ Inskipp et al. (2000)
  13. ↑ Bautista, L. M.; Martín, B.; Martinez, L.; Mayo, C. (2001). "Risk-sensitive foraging in coal tits" (PDF). Behaviour. 138: 69–83. doi:10.1163/156853901750077790. hdl: 10261/43939 . Archived from the original (PDF) on 20 December 2016. Retrieved 9 December 2016.
  14. ↑ Bautista, L. M.; Lane, S.J. (2000). "Coal tits increase evening body mass in response to tawny owl calls" (PDF). Acta Ethologica. 2 (2): 105–110. doi:10.1007/s102119900014. S2CID   33198629. Archived from the original (PDF) on 20 December 2016. Retrieved 9 December 2016.
  15. 1 2 Polo, V.; Bautista, L. M. (2006). "Daily routines of body mass gain in birds: II. An experiment with reduced food availability" (PDF). Animal Behaviour. 72 (3): 517–522. doi:10.1016/j.anbehav.2005.09.025. S2CID   53156385. Archived from the original (PDF) on 20 December 2016. Retrieved 12 December 2016.
  16. ↑ Polo, V.; Bautista, L. M. (2002). "Daily body mass regulation in dominance-structured Coal tit (Parus ater) flocks in response to variable food access" (PDF). Behavioral Ecology. 13: 696–704. doi: 10.1093/beheco/13.5.696 . Archived from the original (PDF) on 20 December 2016. Retrieved 12 December 2016.
  17. ↑ "Birds' blood functions as heating system in winter". phys.org. Retrieved 10 April 2021.
  18. ↑ Nord, Andreas; Metcalfe, Neil B.; Page, Jennifer L.; Huxtable, Anna; McCafferty, Dominic J.; Dawson, Neal J. (2021). "Avian red blood cell mitochondria produce more heat in winter than in autumn". The FASEB Journal. 35 (5): e21490. doi: 10.1096/fj.202100107R . ISSN   1530-6860. PMID   33829547. S2CID   233185485.
  19. ↑ BLI (2009)
  20. ↑ Gunvor Brinck-Lindroth; F.G.A.M. Smit † (2007). The fleas (Siphonaptera) of Fennoscandia and Denmark. BRILL. p. 6. ISBN   978-90-474-2075-0.

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References

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