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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Subsectio: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Theropoda
Cladus: Neotheropoda
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Euornithes
Cladus: Ornithuromorpha
Cladus: Ornithurae
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Ordo: Charadriiformes
Subordo: Charadrii

Familia: Haematopodidae
Genus: Haematopus
Species: H. ater – H. bachmani – H. chathamensis – H. finschi – H. fuliginosus – H. leucopodus – H. longirostris – H. moquini – H. ostralegus – H. palliatus – H. unicolor

Species extincta: †H. meadewaldoi

Haematopus Linnaeus, 1758

Haematopus ostralegus Linnaeus, 1758


Linnaeus, C. 1758. Systema Naturae per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Tomus I. Editio decima, reformata. Holmiæ: impensis direct. Laurentii Salvii. i–ii, 1–824 pp DOI: 10.5962/bhl.title.542: 152. Reference page.

Vernacular names
Afrikaans: Tobies
العربية: صائد المحار
azərbaycanca: Alacüllüt
беларуская: Кулікі-сарокі
brezhoneg: Morbig
dansk: Strandskade
Deutsch: Austernfischer
English: Oystercatcher
Esperanto: Hematopedoj
español: Ostrero
فارسی: صدف‌خوار
suomi: Meriharakat
Nordfriisk: Liiwen
français: Huîtrier
Frysk: Strânljippen
Gaeilge: Roilleach
עברית: שלצדפיים
magyar: Csigaforgató
հայերեն: Կտցար կաչաղակներ
italiano: Beccaccia di mare
日本語: ミヤコドリ属
한국어: 검은머리물떼새류
lietuvių: Jūrinės šarkos
latviešu: Jūras žagatas
മലയാളം: കക്കകൊത്തി
Plattdüütsch: Strandhecksters
Nederlands: Scholekster
norsk nynorsk: Tjeld
norsk: Tjeld
Diné bizaad: Tábąąh chʼosh haalzheehii
polski: Ostrygojady
português: Ostraceiro
русский: Кулики-сороки
svenska: Strandskata
Kiswahili: Kizamiachaza
Türkçe: Poyraz kuşugiller
українська: Кулик-сорока
Zeêuws: Zeêlieven
中文: 蠣鷸科

The oystercatchers are a group of waders forming the family Haematopodidae, which has a single genus, Haematopus. They are found on coasts worldwide apart from the polar regions and some tropical regions of Africa and South East Asia. The exceptions to this are the Eurasian oystercatcher, the South Island oystercatcher, and the Magellanic oystercatcher, which also breed inland, far inland in some cases. In the past there has been a great deal of confusion as to the species limits, with discrete populations of all black oystercatchers being afforded specific status but pied oystercatchers being considered one single species.[1]


The genus Haematopus was introduced in 1758 by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae to accommodate a single species, the Eurasian oystercatcher (Haematopus ostralegus.[2] The genus name Haematopus comes from the Greek haima αἳμα blood, pous πούς foot.[3] Haematopus had been used for the Eurasian oystercatcher by the French naturalist Pierre Belon in 1555.[4]

The name oystercatcher was coined by Mark Catesby in 1731 as a common name for the North American species H. palliatus, described as eating oysters.[5][6] Yarrell in 1843 established this as the preferred term, replacing the older name sea pie[5][7]


The different species of oystercatcher show little variation in shape or appearance. They range from 39–50 centimetres (15+1⁄2–19+1⁄2 inches) in length and 72–91 cm (28+1⁄2–36 in) in wingspan. The Eurasian oystercatcher is the lightest on average, at 526 grams (1 pound 2+1⁄2 ounces), while the sooty oystercatcher is the heaviest, at 819 g (1 lb 13 oz).[8] The plumage of all species is either all-black, or black (or dark brown) on top and white underneath. The variable oystercatcher is slightly exceptional in being either all-black or pied. They are large, obvious, and noisy plover-like birds, with massive long orange or red bills used for smashing or prying open molluscs. The bill shape varies between species, according to the diet. Those birds with blade-like bill tips pry open or smash mollusc shells, and those with pointed bill tips tend to probe for annelid worms. They show sexual dimorphism, with females being longer-billed and heavier than males.[1]


The diet of oystercatchers varies with location. Species occurring inland feed upon earthworms and insect larvae.[1] The diet of coastal oystercatchers is more varied, although dependent upon coast type; on estuaries, bivalves, gastropods and polychaete worms are the most important part of the diet, whereas rocky shore oystercatchers prey upon limpets, mussels, gastropods, and chitons. Other prey items include echinoderms, fish, and crabs.

Oystercatcher chicks and eggs

Nearly all species of oystercatcher are monogamous, although there are reports of polygamy in the Eurasian oystercatcher. They are territorial during the breeding season (with a few species defending territories year round). There is strong mate and site fidelity in the species that have been studied, with one record of a pair defending the same site for 20 years. A single nesting attempt is made per breeding season, which is timed over the summer months. The nests of oystercatchers are simple affairs, scrapes in the ground which may be lined, and placed in a spot with good visibility. The eggs of oystercatchers are spotted and cryptic. Between one and four eggs are laid, with three being typical in the Northern Hemisphere and two in the south. Incubation is shared but not proportionally, females tend to take more incubation and males engage in more territory defence. Incubation varies by species, lasting between 24–39 days. Oystercatchers are also known to practice "egg dumping." Like the cuckoo, they sometimes lay their eggs in the nests of other species such as seagulls, abandoning them to be raised by those birds.[9]

The Canary Islands oystercatcher became extinct during the 20th century. The Chatham oystercatcher is endemic to the Chatham Islands of New Zealand but is listed as endangered by the IUCN, while both the African and Eurasian oystercatchers are considered near threatened. There has been conflict with commercial shellfish farmers, but studies have found that the impact of oystercatchers is much smaller than that of shore crabs.

The genus contains twelve species.[10]

Species in taxonomic order
Common name Binomial Image Distribution
Magellanic oystercatcher H. leucopodus
Garnot, 1826
Magellanic Oystercatcher.jpg
Southern South America
Blackish oystercatcher H. ater
Vieillot & Oudart, 1825
Haematopus ater.jpg
South America
Black oystercatcher H. bachmani
Audubon, 1838
Black Oystercatcher.jpg
West coast of North America
American oystercatcher H. palliatus
Temminck, 1820
American Oystercatcher.jpg
North and South America
Canary Islands oystercatcher H. meadewaldoi
Bannerman, 1913
Canarian Oystercatcher.jpg
Canary Islands
African oystercatcher H. moquini
(Bonaparte, 1856)
African Black Oystercatcher, (Haematopus moquini) standing on the sand.jpg
Southern Africa
Eurasian oystercatcher
or Palaearctic oystercatcher
H. ostralegus
Linnaeus, 1758
Haematopus ostralegus He.jpg
Europe, Asia and northern Africa
Pied oystercatcher H. longirostris
Vieillot, 1817
Pied Oystercatcher.jpg
South Island oystercatcher H. finschi
Martens, 1897
South Island pied oystercatcher 2c.JPG
New Zealand
Chatham oystercatcher H. chathamensis
Hartert, 1927
Chatham Islands
Variable oystercatcher H. unicolor
Forster, 1844
Variable Oystercatcher.jpg
New Zealand
Sooty oystercatcher H. fuliginosus
Gould, 1845
Sooty Oystercatcher.jpg

Several fossil species are known, including Haematopus sulcatus (Brodkorb, 1955) from the Barstovian of Florida and Zanclean of North Carolina, and which is evidently considered a synonym of the extant species Haematopus palliatus.[11]

Hockey, P (1996) Family Haematopodidae (Oystercatchers) in del Hoyo, J.; Elliot, A. & Sargatal, J. (editors). (1996). Handbook of the Birds of the World. Volume 3: Hoatzin to Auks. Lynx Edicions. ISBN 84-87334-20-2
Linnaeus, Carl (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Volume 1 (10th ed.). Holmiae (Stockholm): Laurentii Salvii. p. 152.
Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 184. ISBN 978-1-4081-2501-4.
Belon, Pierre (1555). L'histoire de la natvre des oyseavx : avec levrs descriptions, & naïfs portraicts retirez du natvrel, escrite en sept livres (in French). Paris: Gilles Corrozet. p. 203.
Lockwood, W.B. (1984). The Oxford Book of British Bird Names. Oxford: Oxford University Press. p. 113. ISBN 978-0-19-214155-2.
Catesby, Mark (1729–1732). The Natural History of Carolina, Florida and the Bahama Islands (in English and French). Volume 1. London: W. Innys and R. Manby. p. 85.
Yarrell, William (1845). A History of British Birds. Volume 2. London: J. Van Voorst. p. 496.
John B. Dunning Jr. (1992). CRC Handbook of Avian Body Masses. CRC Press. p. 98. ISBN 978-0-8493-4258-5.
"Birds Dumping Eggs on the Neighbors". 2011-06-03. Retrieved 2012-12-20.
Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Buttonquail, thick-knees, sheathbills, plovers, oystercatchers, stilts, painted-snipes, jacanas, Plains-wanderer, seedsnipes". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 18 August 2021.
Haematopus palliatus Temminick 1820 (American oystercatcher) at FossilWorks

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