Purple sandpiper

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Purple sandpiper
Calidris maritima.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Scolopacidae
Genus: Calidris
Species:
C. maritima
Binomial name
Calidris maritima
(Brünnich, 1764)
CalidrisMaritimaIUCNver2018 2.png
Range of C. maritima
  Breeding
  Resident
  Non-breeding
  Passage
Synonyms
  • Tringa maritimaBrünnich, 1764
  • Erolia maritima(Brünnich, 1764)
  • Arquatella maritima(Brünnich, 1764)
  • Tringa striataLinnaeus, 1766

The purple sandpiper (Calidris maritima) is a small shorebird in the sandpiper family Scolopacidae. This is a hardy sandpiper that breeds in the arctic and subarctic regions of Eurasia and North America and winters further south on the Atlantic coast.

Contents

Taxonomy

The purple sandpiper was formally described in 1764 by the Danish zoologist Morten Thrane Brünnich and given the binomial name Tringa maratina. [2] This species was formerly placed in the genus Erolia, [3] [4] but is now placed with 23 other sandpipers in the genus Calidris that was introduced in 1804 by the German naturalist Blasius Merrem. [5] [6] The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The specific epithet maritima is from Latin and means "of the sea", from mare, "sea". [7] The purple sandpiper is treated as monotypic: no subspecies are recognised. [6] Within the genus Calidris the purple sandpiper is sister to the rock sandpiper (Calidris ptilocnemis) and is closely related to the sanderling (Calidris alba) and the dunlin (Calidris alpina). [8]

Description

Summer plumage 2019-08-13 02 Purple Sandpiper (Calidris maritima), Reykjavik Iceland.jpg
Summer plumage
Winter plumage Purple Sandpiper (11603866986).jpg
Winter plumage

Adults have short yellow legs and a medium thin dark bill with a yellow base. The body is dark on top with a slight purplish gloss and mainly white underneath. The breast is smeared with grey and the rump is black. They measure 20–22 cm (7.9–8.7 in) in length and 42–46 cm (17–18 in) across the wings, and weight is from 50–105 g (1.8–3.7 oz). [9]

Standard Measurements [10] [11]
Total Body Length 210–240 mm (8.1–9.5 in)
Weight 70 g (2.5 oz)
Wingspan 430 mm (17 in)
Wing 117.9–130 mm (4.64–5.12 in)
Tail 55.9–63 mm (2.20–2.48 in)
Culmen 27.2–32 mm (1.07–1.26 in)
Tarsus 22–23.8 mm (0.87–0.94 in)

Distribution and habitat

The purple sandpiper's breeding range extends from the arctic islands of northern Canada, eastwards to Greenland, Iceland, Svalbard and northern Scandinavia across to Western Siberia and the Taymyr Peninsula. In the high arctic the sandpiper breeds at low altitude on the tundra, sometimes far from the coastline, but in the subarctic regions of Sweden and Norway it breeds on barren mountain sides near the limit of the frozen ground. Birds breeding at high latitudes migrate south and spend the winter on rocky shores on both sides of the north Atlantic. They winter along the North America coast as far south as South Carolina and on the eastern Atlantic coast as far south as France and northern Iberia. [12]

Birds wintering in northern Scotland and southwest Ireland migrate to Canada (Baffin Island and Devon Island) to breed. [13]

In Britain, these birds occur in winter in good numbers principally along the east and south coasts, where they favour rocky shorelines adjacent to the sea.[ citation needed ] It is much rarer as a breeding bird, found only in a localised area of the Cairngorms National Park, where 1–3 pairs have bred since 1978. Records of breeding by this species in the UK are monitored and archived by the Rare Breeding Birds Panel. [14] [15]

They are late migrants and move to rocky, ice-free Atlantic coasts in winter.[ citation needed ] Most go no further south than North Carolina and northern Portugal. They are fairly gregarious, forming small flocks, often with ruddy turnstones. This species is tame and approachable. [16]

Behaviour and ecology

Breeding

Eggs of the calidris maritima maritima Calidris maritima maritima MHNT.ZOO.2010.11.119.17.jpg
Eggs of the calidris maritima maritima

Their breeding habitat is the northern tundra on Arctic islands in Canada and coastal areas in Greenland and northwestern Europe. They can breed at one year of age. The male makes several scrapes on the ground; the female chooses one and lays 3 or 4 eggs. These are olive with brown blotches and are approximately 37 mm × 26 mm (1.5 in × 1.0 in) in size. The male takes the major responsibility for incubation of the eggs which hatch in 21–22 days. [17] The chicks are covered with dense down. The upperparts have black and cinnamon patches with white specks; the underparts are mainly white. [18] Usually only the male tends the chicks which can feed themselves. [17] The maximum age recorded from ring-recovery data in Europe is 20 years and 9 months for a bird recovered in Sweden. [19]

An apparent case of hybridization between this species and the dunlin has been reported from England. [20]

Feeding

These birds forage on rocky coasts, picking up food by sight. [21] They mainly eat arthropods and molluscs, mainly littorinids and mussels, also some plant material. One of the main staples are seaweed flies of the Coelopa genera ( C. frigida ). [22]

Status

The purple sandpiper has an extremely large range and although the population appears to be decreasing, the population is very large. The International Union for Conservation of Nature (IUCN) has judged that the threat to the species is of "Least concern". [1] The purple sandpiper is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies. [23]

Related Research Articles

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References

  1. 1 2 BirdLife International (2018). "Calidris maritima". IUCN Red List of Threatened Species . 2018: e.T22693420A131929424. doi: 10.2305/IUCN.UK.2018-2.RLTS.T22693420A131929424.en . Retrieved 13 November 2021.
  2. ↑ Brünnich, Morten Thrane (1764). M. Th. Brünnichii Ornithologia borealis, sistens collectionem avium : ex omnibus, Imperio danico subjectis, provinciis insulisqve borealibus Hafniæ factam, cum descriptionibus novarum, nominibus incolarum, locis natalium et icone (in Latin). Hafniae [Copenhagen]: Imprimatur J.C. Kall. pp. 54–55.
  3. ↑ Peters, James Lee, ed. (1934). Check-List of Birds of the World. Vol. 2. Cambridge, Massachusetts: Harvard University Press. p. 285.
  4. ↑ Committee on Classification and Nomenclature (1973). "Thirty-Second Supplement to the American Ornithologists' Union Check-List of North American Birds". Auk. 90 (2): 411–419 [415].
  5. ↑ Merrem, Blasius (8 June 1804). "Naturgeschichte". Allgemeine Literatur-Zeitung (in German). 168. Col. 542. Published anonymously.
  6. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Sandpipers, snipes, coursers". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 13 November 2021.
  7. ↑ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp.  84, 242. ISBN   978-1-4081-2501-4.
  8. ↑ Gibson, Rosemary; Baker, Allan (2012). "Multiple gene sequences resolve phylogenetic relationships in the shorebird suborder Scolopaci (Aves: Charadriiformes)". Molecular Phylogenetics and Evolution. 64 (1): 66–72. doi:10.1016/j.ympev.2012.03.008. PMID   22491071.
  9. ↑ "Purple Sandpiper". All About Birds. Cornell Lab of Ornithology.
  10. ↑ Godfrey, W. Earl (1966). The Birds of Canada. Ottawa: National Museum of Canada. p. 151.
  11. ↑ Sibley, David Allen (2000). The Sibley Guide to Birds . New York: Knopf. p.  181. ISBN   0-679-45122-6.
  12. ↑ Payne, L.X.; Pierce, E.P. (2020). Billerman, S.M. (ed.). "Purple Sandpiper (Calidris maritima), version 1.0" . Birds of the World. Ithaca, NY, USA: Cornell Lab of Ornithology. doi:10.2173/bow.pursan.01 . Retrieved 14 November 2021.
  13. ↑ Summers, R.W.; Boland, H.; Colhoun, K.; Elkins, N.; Etheridge, B.; Foster, S.; Fox, J.W.; Mackie, K.; Quinn, L.R.; Swann, R.L. (2014). "Contrasting trans-Atlantic migratory routes of Nearctic Purple Sandpipers Calidris maritima associated with low pressure systems in spring and winter". Ardea. 102 (2): 139–152. doi: 10.5253/arde.v102i2.a4 .
  14. ↑ Sharrock, J.T.R.; Rare Birds Breeding Panel (1980). "Rare breeding birds in the United Kingdom in 1978". British Birds. 73 (1): 5–26 [18].
  15. ↑ Holling, Mark; Rare Birds Breeding Panel (2016). "Rare breeding birds in the United Kingdom in 2014". British Birds. 109 (9): 491–545 [521].
  16. ↑ Cramp 1983, p. 350.
  17. 1 2 Cramp 1983, p. 353.
  18. ↑ Cramp 1983, p. 354.
  19. ↑ "European Longevity Records". Euring. Retrieved 13 November 2021.
  20. ↑ Millington, Richard (1994). "A mystery Calidris at Cley". Birding World . 7 (2): 61–63. Archived from the original on 17 June 2004.
  21. ↑ Cramp 1983, p. 348.
  22. ↑ Summers, R. W.; Smith, S.; Nicoll, M.; Atkinson, N. K. (1990). "Tidal and sexual differences in the diet of Purple Sandpipers Calidris maritima in Scotland". Bird Study. 37 (3): 187–194. Bibcode:1990BirdS..37..187S. doi:10.1080/00063659009477056. ISSN   0006-3657.
  23. ↑ "Species". Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). Retrieved 14 November 2021.

Sources

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