Oystercatcher Press
   HOME

TheInfoList



OR:

The oystercatchers are a group of
wader 245px, A flock of Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflats in order to foraging, ...
s forming the
family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
Haematopodidae, which has a single
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
, ''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 Eurasian oystercatcher (''Haematopus ostralegus'') also known as the common pied oystercatcher, or (in Europe) just oystercatcher, is a wader in the oystercatcher bird family Haematopodidae. It has striking black and white plumage, a long st ...
, the
South Island oystercatcher The South Island oystercatcher or South Island pied oystercatcher (''Haematopus finschi'') is one of two common oystercatcher species found in New Zealand. Its name is often contracted to the acronym "SIPO" (rhyming with "typo"). The indigenous ...
, 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.Hockey, P (1996). "Family Haematopodidae (Oystercatchers)". In del Hoyo, J.; Elliot, A. & Sargatal, J. (editors). ''
Handbook of the Birds of the World The ''Handbook of the Birds of the World'' (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. ...
''. Volume 3: ''Hoatzin to Auks''. Lynx Edicions. .


Taxonomy

The
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
''Haematopus'' was introduced in 1758 by the Swedish naturalist
Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...
in 1758 in the
tenth edition Tenth may refer to: Numbers * 10th, the ordinal form of the number ten * One tenth, , or 0.1, a fraction, one part of a unit divided equally into ten parts. ** the SI prefix deci- ** tithe, a one-tenth part of something * 1/10 of any unit of me ...
of his ''
Systema Naturae ' (originally in Latin written ' with the Orthographic ligature, ligature æ) is one of the major works of the Sweden, Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the syste ...
'' to accommodate a single species, the
Eurasian oystercatcher The Eurasian oystercatcher (''Haematopus ostralegus'') also known as the common pied oystercatcher, or (in Europe) just oystercatcher, is a wader in the oystercatcher bird family Haematopodidae. It has striking black and white plumage, a long st ...
''Haematopus ostralegus''. The genus name ''Haematopus'' comes from the
Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...
words ''haima'' αἳμα meaning blood, and ''pous'' πούς meaning foot, referring to the red legs of the Eurasian oystercatcher; it had been in use since
Pierre Belon Pierre Belon (1517–1564) was a French traveller, natural history, naturalist, writer and diplomat. Like many others of the Renaissance period, he studied and wrote on a range of topics including ichthyology, ornithology, botany, comparative anat ...
in 1555. The family Haematopodidae was introduced (as the subfamily Haematopodinae) by the French naturalist Charles Bonaparte in 1838. The
common name In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often con ...
''oystercatcher'' was coined by
Mark Catesby Mark Catesby (24 March 1683 – 23 December 1749) was an English natural history, naturalist who studied the flora and fauna of the New World. Between 1729 and 1747, Catesby published his ''Natural History of Carolina, Florida and the Bahama ...
in 1731 for the
North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
n species '' H. palliatus'', which he described as eating
oyster Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but no ...
s. The English zoologist
William Yarrell William Yarrell (3 June 1784 – 1 September 1856) was an English zoologist, prolific writer, bookseller and naturalist admired by his contemporaries for his precise scientific work. Yarrell is best known as the author of ''A History of Briti ...
in 1843 established this as the preferred term, replacing the older name ''sea pie'', although the term had earlier been used by the Welsh Naturalist
Thomas Pennant Thomas Pennant (16 December 1798) was a Welsh natural history, naturalist, traveller, writer and antiquarian. He was born and lived his whole life at his family estate, Downing Hall, near Whitford, Flintshire, in Wales. As a naturalist he had ...
in 1776 in his ''British Zoology''.


Description

The different species of oystercatcher show little variation in shape or appearance. They range from in length and in wingspan. The
Eurasian oystercatcher The Eurasian oystercatcher (''Haematopus ostralegus'') also known as the common pied oystercatcher, or (in Europe) just oystercatcher, is a wader in the oystercatcher bird family Haematopodidae. It has striking black and white plumage, a long st ...
is the lightest on average, at , while the
sooty oystercatcher The sooty oystercatcher (''Haematopus fuliginosus'') is a species of oystercatcher. It is a wading bird endemic to Australia and commonly found on its coastline. It prefers rocky coastlines, but will occasionally live in estuaries. All of its fea ...
is the heaviest, at . The
plumage Plumage () is a layer of feathers that covers a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage differ between species and subspecies and may vary with age classes. Within species, there can b ...
of all species is either all-black, or black (or dark brown) on top and white underneath. The
variable oystercatcher The variable oystercatcher (''Haematopus unicolor'') is a species of wader in the family Haematopodidae. It is Endemism, endemic to New Zealand. The Māori name is tōrea-pango. They are also known as 'red bills'. Description "Variable" refers ...
is slightly exceptional in being either all-black or pied. They are large, obvious, and noisy
plover Plovers ( , ) are members of a widely distributed group of wader, wading birds of subfamily Charadriinae. The term "plover" applies to all the members of the subfamily, though only about half of them include it in their name. Species lis ...
-like
bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...
s, with massive long orange or red bills used for smashing or prying open
mollusc Mollusca is a phylum of protostome, protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant taxon, extant species of molluscs are recognized, making it the second-largest animal phylum ...
s. 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 The annelids (), also known as the segmented worms, are animals that comprise the phylum Annelida (; ). The phylum contains over 22,000 extant species, including ragworms, earthworms, and leeches. The species exist in and have adapted to vario ...
worms. They show
sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, di ...
, with females being longer-billed and heavier than males.


Feeding

The diet of oystercatchers varies with location. Species occurring inland feed upon
earthworm An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they we ...
s and insect larvae. The diet of coastal oystercatchers is more varied, although dependent upon coast type; on estuaries,
bivalve Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed b ...
s, the ivy
gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...
s and
polychaete Polychaeta () is a paraphyletic class of generally marine Annelid, annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called c ...
worms are the most important part of the diet, whereas rocky shore oystercatchers prey upon
limpets Limpets are a group of aquatic snails with a conical shell shape (patelliform) and a strong, muscular foot. This general category of conical shell is known as "patelliform" (dish-shaped). Existing within the class Gastropoda, limpets are a po ...
,
mussel Mussel () is the common name used for members of several families of bivalve molluscs, from saltwater and Freshwater bivalve, freshwater habitats. These groups have in common a shell whose outline is elongated and asymmetrical compared with other ...
s, gastropods, and
chiton Chitons () are marine molluscs of varying size in the class Polyplacophora ( ), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized. They are also sometimes known as sea cradles or coat-of-mail shells or suck ...
s. Other prey items include
echinoderm An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as ...
s, fish, and crabs.


Breeding

Nearly all species of oystercatcher are
monogamous Monogamy ( ) is a relationship of two individuals in which they form a mutual and exclusive intimate partnership. Having only one partner at any one time, whether for life or serial monogamy, contrasts with various forms of non-monogamy (e.g. ...
, although there are reports of polygamy in the Eurasian oystercatcher. They are
territorial A territory is an area of land, sea, or space, belonging or connected to a particular country, person, or animal. In international politics, a territory is usually a geographic area which has not been granted the powers of self-government, ...
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 A nest is a structure built for certain animals to hold eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic materi ...
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.


Conservation

The
Canary Islands oystercatcher The Canary Islands oystercatcher, Canarian oystercatcher, or Canarian black oystercatcher (''Haematopus meadewaldoi''), Etymology: ''Haematopus'', Latinized Ancient Greek for "bloody-footed", from ''(h)aimato-'' (αίματό-), '"blood-" + ''-p ...
became extinct during the 20th century. The Chatham oystercatcher is endemic to the
Chatham Islands The Chatham Islands ( ; Moriori language, Moriori: , 'Misty Sun'; ) are an archipelago in the Pacific Ocean about east of New Zealand's South Island, administered as part of New Zealand, and consisting of about 10 islands within an approxima ...
of New Zealand and is listed as endangered by the
IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...
, 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.


Species

The genus contains twelve
Recent The Holocene () is the current geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Qu ...
species. Species in taxonomic order: The earliest
fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserve ...
of a ''Haematopus''-like bird is a skull from the
Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...
of
Saint-Gérand-le-Puy Saint-Gérard-le-Puy (; ) is a commune in the Allier department in Auvergne-Rhône-Alpes in central France. Geography Much of the local rock is limestone common in the Auvergne, known as ''indusial'', because of the cases, or ''indusiae'', o ...
,
France France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
. The only other pre-
Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...
fossils are from the
Pliocene The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58Barstovian The Barstovian North American Stage on the geologic timescale is the North American faunal stage according to the North American Land Mammal Ages chronology (NALMA), typically set from 16,300,000 to 13,600,000 years BP, a period of . It is usua ...
of Florida, but is now considered to belong to the modern genus. Two species are also known from Pliocene
Yorktown Formation The Yorktown Formation is a mapped bedrock unit in the Coastal Plain of Maryland, Virginia, North Carolina and South Carolina. It is overconsolidated and highly fossiliferous. Description The Yorktown is composed largely of overconsolidated san ...
of North Carolina, and have been referred to ''H.'' aff. ''palliatus'' and ''H.'' aff. ''ostralegus''.


References


External links

*
ARKive ARKive was a global initiative with the mission of "promoting the conservation of the world's threatened species, through the power of wildlife imagery", which it did by locating and gathering films, photographs and audio recordings of the wor ...

images and movies of the oystercatcher ''(Haematopus ostralegus)''

Oystercatcher videos
on the Internet Bird Collection
LIVE webcam at the seashore in Namsos, Norway 2013
{{Taxonbar, from=Q27515 . Charadrii Shorebirds Taxa named by Carl Linnaeus no:Tjeldfamilien nn:Tjeldfamilien