Red-necked avocet

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Red-necked avocet
Recurvirostra novaehollandiae - Stockton Sandspit.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Recurvirostridae
Genus: Recurvirostra
Species:
R. novaehollandiae
Binomial name
Recurvirostra novaehollandiae
Vieillot, 1816
Synonyms [2]

Recurvirostra rubricollis Temminck, 1820

The red-necked avocet (Recurvirostra novaehollandiae) also known as the Australian avocet, cobbler, cobbler's awl, and painted lady, is a wader of the family Recurvirostridae that is endemic to Australia and is fairly common and widespread throughout, except for the north and north east coastal areas of the country. Closely related to the stilts, it shares their fragile slender elegance, however the deep red head and neck distinguish them. [3] It appeared on a 13 cent postage stamp in 1966.

Contents

Taxonomy

The French naturalist Louis Pierre Vieillot described the red-necked avocet in 1816, and it still bears its original name. [4] It is one of four species of avocet that make up the genus Recurvirostra. [5] A 2004 study combining genetics and morphology showed that it was the sister taxon to a lineage that gave rise to the Andean and American avocets. [6]

Description

Lake Joondalup, Western Australia Recurvirostra novaehollandiae in flight - Lake Joondalup.jpg
Lake Joondalup, Western Australia

The distinguishing feature of the red-necked avocet, and all avocet species, is the distinctive upcurved bill that is used for skimming the surface of water to catch small invertebrates. The adult's head and neck is a rich chestnut brown in colour (from which it derives its name) with a narrow white eye ring and a red-brown iris. The secondary coverts and primary feathers are black and the remainder of the plumage is white. The bill is black and the legs are a pale grey-blue. Both male and female are similar in colouring and size; neither is there seasonal variation in appearance. Juveniles are similar in appearance and difficult to identify once post-juvenile moult has started, the head is sometimes paler and browner that the adults. [7] An average adult red-necked avocet measures 43–45 cm (17–17.5 in) from head to tail, and has a total wingspan of around 75 cm (29.5 in), wing length 22.4–23 cm, tail length 7.9–8.8 cm, and bill length of 8.2–9.5 cm, and weighs around 310 g. [3]

The call has been described as a yapping, and flocks in flight making a sound reminiscent of dogs barking. [8]

Distribution and habitat

Like many waterbirds found in Australia, the red-necked avocet is highly nomadic, due mainly to the high variation in rainfall, moving around the continent in search of suitable habitat. It has a very wide range in Australia but is comparatively rare on the northern and north-eastern coasts. The birds have a preference for salt or brackish water and are generally found in shallow wetland areas that are either fresh or salt, or on estuarine mudflats. [9] The species is rare in Tasmania and an occasional vagrant to New Zealand. [10]

Ecology and behaviour

Mainly found in loose colonies during the breeding season, the red-necked avocet disperses in small flocks for the rest of the year. Social in all activities and during all seasons, they are known to associate happily with stilts. Pre-mating courtship involves bill crossing and bowing dances with the female indicating their readiness to mate by crouching low with wings spread, this usually occurs in shallow water. Each pair defends their nesting territory with a range of displays and postures and will swoop repeatedly at intruders. Its voice is similar to other avocets, common calls include a fluty clear ‘tuut’ or ‘kluut’ that generally serves as a contact call with a shorter and sharper yelping notes reserved for warning calls. It can be fairly sedentary when in suitable conditions, though will quickly migrate towards coastal areas during dry weather. [3]

Diet and feeding

The diet mainly consists of small invertebrates that it catches in the shallows by sweeping its slender up curved bill from side to side through the water surface and underlying mud. As, unlike other shore birds, they swim readily, this enables them to upend in deeper water (like a duck) and continue feeding. Food consists of mainly aquatic insects and their larvae such as brine shrimp, crustaceans and also seeds. Juveniles are often limited to small insects and seeds until their bill is more developed, consuming food with a pecking action rather than the water skimming done by adults. [11]

Breeding and reproduction

In SE Queensland

The red-necked avocet nests in loose colonies, rarely large, mainly during August–November. This however is often highly variable depending on rainfall and water availability. Breeding usually takes place in the south western interior on areas of swamps and mudflats after rain, though small colonies have been documented nesting on Port Phillip Bay near Melbourne in Victoria. The nest consists of a shallow scrape that is lined with samphire or similar water vegetation. Clutch size consists of 3–4 eggs, usually 4 that are pyriform and a pale brown with some speckled sepia colouring. Eggs measure 36 by 50 mm. [12] The eggs are arranged in a circle, with the acute ends toward the centre. [8]

Predators and threats

Due to their relatively large size, red-necked avocets have few predators. Introduced or feral animals, including red foxes or feral cats, take chicks and eggs. Climate change may reduce the number of inland breeding areas through extended drought periods. [13] In order to avoid predators, red-necked avocets have been observed to pretend to have a broken or injured limb in order to lure predators away from vulnerable chicks. [11]

Related Research Articles

<span class="mw-page-title-main">Avocet</span> Genus of birds

The four species of avocets are a genus, Recurvirostra, of waders in the same avian family as the stilts. The genus name comes from Latin recurvus, 'curved backwards' and rostrum, 'bill'. The common name is thought to derive from the Italian (Ferrarese) word avosetta. Francis Willughby in 1678 noted it as the "Avosetta of the Italians".

<span class="mw-page-title-main">American avocet</span> Species of bird

The American avocet is a large wader in the avocet and stilt family, Recurvirostridae, found in North America. It spends much of its time foraging in shallow water or on mud flats, often sweeping its bill from side to side in water as it seeks crustacean and insect prey.

<span class="mw-page-title-main">Black-fronted dotterel</span> Species of bird

The black-fronted dotterel is a small plover wader in the family Charadriidae.

<span class="mw-page-title-main">Semipalmated sandpiper</span> Species of bird

The semipalmated sandpiper is a very small shorebird. The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The specific pusilla is Latin for "very small".

<span class="mw-page-title-main">Least sandpiper</span> Species of bird

The least sandpiper is the smallest shorebird. The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-colored waterside birds. The specific minutilla is Medieval Latin for "very small".

<span class="mw-page-title-main">Short-billed dowitcher</span> Species of bird

The short-billed dowitcher, like its congener the long-billed dowitcher, is a medium-sized, stocky, long-billed shorebird in the family Scolopacidae.

<span class="mw-page-title-main">Pied avocet</span> Species of bird

The pied avocet is a large black and white wader in the avocet and stilt family, Recurvirostridae. They breed in temperate Europe and across the Palearctic to Central Asia then on to the Russian Far East. It is a migratory species and most winter in Africa or southern Asia. Some remain to winter in the mildest parts of their range, for example in southern Spain and southern England. The pied avocet is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

<span class="mw-page-title-main">Sharp-tailed sandpiper</span> Species of shorebird

The sharp-tailed sandpiper is a small-medium migratory wader or shorebird, found mostly in Siberia during the summer breeding period and Australia for wintering.

<span class="mw-page-title-main">Forster's tern</span> Species of bird

Forster's tern is a tern in the family Laridae. The genus name Sterna is derived from Old English "stearn", "tern", and forsteri commemorates the naturalist Johann Reinhold Forster.

<span class="mw-page-title-main">White-faced heron</span> Species of bird

The white-faced heron also known as the white-fronted heron, and incorrectly as the grey heron, or blue crane, is a common bird throughout most of Australasia, including New Guinea, the islands of Torres Strait, Indonesia, New Zealand, and all but the driest areas of Australia.

<span class="mw-page-title-main">Banded stilt</span> Species of Australian bird in the family Recurvirostridae

The banded stilt is a nomadic wader of the stilt and avocet family, Recurvirostridae, native to Australia. It belongs to the monotypic genus Cladorhynchus. It gets its name from the red-brown breast band found on breeding adults, though this is mottled or entirely absent in non-breeding adults and juveniles. Its remaining plumage is pied and the eyes are dark brown. Nestling banded stilts have white down, unlike any other species of wader.

<span class="mw-page-title-main">Banded lapwing</span> Species of bird

The banded lapwing is a small to medium-sized shorebird, found in small parties or large flocks on bare ground in open grasslands, agricultural land and open savannah. It is native to Australia and in the past considered as a game bird for hunting. Population estimate is 25 000 - 1 000 000. Other names include banded, black-breasted, brown flock and plain plover.

<span class="mw-page-title-main">Nankeen night heron</span> Species of bird

The nankeen night heron is a heron that belongs to the genus Nycticorax and the family Ardeidae. Due to its distinctive reddish-brown colour, it is also commonly referred to as the rufous night heron. It is primarily nocturnal and is observed in a broad range of habitats, including forests, meadows, shores, reefs, marshes, grasslands, and swamps. The species is 55 to 65 cm in length, with rich cinnamon upperparts and white underparts. The nankeen night heron has a stable population size, and is classified as a species of least concern by the International Union for Conservation of Nature (IUCN).

<span class="mw-page-title-main">Straw-necked ibis</span> Species of bird

The straw-necked ibis is a bird of the ibis and spoonbill family Threskiornithidae. It can be found throughout Australia, New Guinea, and parts of Indonesia. Adults have distinctive straw-like feathers on their necks.

<span class="mw-page-title-main">Australasian grebe</span> Species of bird

The Australasian grebe is a small waterbird common on fresh water lakes and rivers in greater Australia, New Zealand and on nearby Pacific islands. At 25–27 cm (9.8–10.6 in) in length, it is one of the smallest members of the grebe family, along with the least grebe and little grebe.

<span class="mw-page-title-main">White-fronted plover</span> Species of shorebird of the family Charadriidae from Sub-Saharan Africa and Madagascar

The white-fronted plover or white-fronted sandplover is a small shorebird of the family Charadriidae that inhabits sandy beaches, dunes, mudflats and the shores of rivers and lakes in sub-saharan Africa and Madagascar. It nests in small shallow scrapes in the ground and lays clutches of one to three eggs. The species is monogamous and long-lived, with a life expectancy of approximately 12 years. The vast majority of pairs that mate together stay together during the following years of breeding and retain the same territory. The white-fronted plover has a similar appearance to the Kentish plover, with a white fore crown and dark bands connecting the eyes to the bill.

<span class="mw-page-title-main">Andean avocet</span> Species of bird

The Andean avocet is a large wader in the avocet and stilt bird family, Recurvirostridae. It is resident in the Andes, breeding above 3500 m in northwestern Argentina, western Bolivia, northern Chile and southern Peru.

<span class="mw-page-title-main">Madagascar plover</span> Species of bird

The Madagascar plover, also known as the black-banded plover, is a small monogamous shorebird in the family Charadriidae, native to western Madagascar. It inhabits shores of lagoons, coastal grasslands, and breeds in salt marshes. These plovers mainly nest in open grassland and dry mudflats surrounding alkaline lakes. The species is classified as vulnerable by the IUCN because of its low breeding success, slow reproductive rate, and weak adaptation to increasing habitat loss, leading to declining population numbers.

<span class="mw-page-title-main">Black-necked stilt</span> Species of bird

The black-necked stilt is a locally abundant shorebird of American wetlands and coastlines. It is found from the coastal areas of California through much of the interior western United States and along the Gulf of Mexico as far east as Florida, then south through Central America and the Caribbean to Brazil, Peru and the Galápagos Islands, with an isolated population, the Hawaiian stilt, in Hawaii. The northernmost populations, particularly those from inland, are migratory, wintering from the extreme south of the United States to southern Mexico, rarely as far south as Costa Rica; on the Baja California peninsula it is only found regularly in winter. Some authorities, including the IUCN, treat it as a synonym of Himantopus himantopus.

<span class="mw-page-title-main">Hawaiian stilt</span> Subspecies of bird

The Hawaiian stilt is an endangered Hawaiian subspecies of the black-necked stilt species. It is a long-legged, slender shorebird with a long, thin beak. Other common names include the Hawaiian black-necked stilt, the aeʻo, the kukuluaeʻo, or it may be referred to as the Hawaiian subspecies of the black-necked stilt.

References

  1. BirdLife International (2016). "Recurvirostra novaehollandiae". IUCN Red List of Threatened Species . 2016: e.T22693720A93419069. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22693720A93419069.en . Retrieved 19 November 2021.
  2. "Recurvirostra novaehollandiae Vieillot, 1816". Atlas of Living Australia. Retrieved 17 February 2018.
  3. 1 2 3 Pringle, John (1987). The shorebirds of Australia (1. publ. ed.). North Ryde, N.S.W., Australia: Angus & Robertson. pp. 167–171. ISBN   0207153485.
  4. Department of the Environment, Water, Heritage and the Arts (9 October 2008). "Species Recurvirostra novaehollandiae Vieillot, 1816". Australian Biological Resources Study: Australian Faunal Directory. Commonwealth of Australia. Retrieved 16 June 2012.{{cite web}}: CS1 maint: multiple names: authors list (link)
  5. Sibley, Charles Gald; Monroe, Burt Leavelle (1990). Distribution and Taxonomy of Birds of the World. Yale University Press. p. 246. ISBN   0300049692.
  6. Thomas, Gavin H.; Wills, Matthew A.; Székely, Tamás (2004). "A supertree approach to shorebird phylogeny". BMC Evolutionary Biology . 4: 28. doi: 10.1186/1471-2148-4-28 . PMC   515296 . PMID   15329156. Supplementary Material
  7. A-Z Animals. "Avocet". A-Z Animals. Retrieved June 16, 2012.
  8. 1 2 Wade Peter, ed. (1977). Every Australian Bird Illustrated. Rigby. pp. 106–07. ISBN   0-7270-0009-8.
  9. "Birds in Backyards". Birds in Backyards. Retrieved June 16, 2012.
  10. Slater, Peter (1970). A Field Guide to Australian Birds: Vol.1. Non-passerines . Adelaide: Rigby. p. 311. ISBN   0-85179-102-6.
  11. 1 2 van de Kam, Jan; Ens, Bruno; Piersma, Theunis; Zwarts, Leo (2004). Shorebirds : an illustrated behavioural ecology. Utrecht, The Netherlands: KNNV. p. 39. ISBN   9050111920.
  12. Beruldsen, Gordon (2003). Australian Birds: Their Nests and Eggs. Kenmore Hills, Qld: self. p. 218. ISBN   0-646-42798-9.
  13. "Threat abatement plan for predation by the European red fox" (PDF). Department of Sustainability, Environment, Water, Population and Communities. Retrieved June 17, 2012.