Yellow-billed spoonbill

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Yellow-billed spoonbill
Platalea flavipes - Mount Annan Botanical Gardens.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Pelecaniformes
Family: Threskiornithidae
Genus: Platalea
Species:
P. flavipes
Binomial name
Platalea flavipes
Gould, 1838
Synonyms

Platibis flavipes

over Murray River, South Australia Yellow-billed spoonbill (Platalea flavipes) in flight Blanchetown 2.jpg
over Murray River, South Australia

The yellow-billed spoonbill (Platalea flavipes) is a gregarious wading bird of the ibis and spoonbill family, Threskiornithidae. It is native to Australia, and is a vagrant to New Zealand, Lord Howe Island and Norfolk Island.

Contents

Taxonomy

The renowned ornithologist John Gould first described the yellow-billed spoonbill, naming it Platalea flavipes although noting its distinctness from other members of the genus. Bonaparte erected the genus Platibis in 1856, and Gould followed this classification in his later work. He noted the species appeared in great numbers across New South Wales in 1839, particularly in the north between the Hunter and lower Namoi Rivers. The year had been wet, in contrast to droughts in previous years. [2]

A 2010 study of mitochondrial DNA of the spoonbills by Chesser and colleagues found that the yellow-billed and roseate spoonbills were each other's closest relative, and the two were descended from an early offshoot from the ancestors of the other four spoonbill species. They felt the genetic evidence meant it was equally valid to consider all six to be classified within the genus Platalea or alternatively the two placed in the monotypic genera Platibis and Ajaia respectively. However, as the six species were so similar morphologically, keeping them within the one genus made more sense. [3]

Description

Measuring around 90 cm (35.5 in), the yellow-billed spoonbill has all white plumage. The long spoon-shaped bill, bare-skinned face, legs and feet are all yellow, while the iris is pale yellow. [4] The sexes are similar in plumage and coloration. In the breeding season, the face is lined with black, long hackles develop on the chest, and the wings have black tips. [5] The bill of the yellow-billed spoonbill is narrower and works more like a forceps than the larger-ended and more spoon-like bill of the royal spoonbill, which acts like a pair of tongs. [6] Like all members of the ibis and spoonbill family, it always flies with its head extended.

Distribution and habitat

The yellow-billed spoonbill is found across eastern, northern and southwestern Australia, particularly around water, and has been recorded as a vagrant to New Zealand, Lord Howe Island and Norfolk Island. [5] It is not found in Tasmania. [4] It nests in trees, marshes or reed-beds, and often roosts in trees. It occurs in shallows of wetlands, and occasionally on dry pasture.

Feeding

Yellow-billed spoonbill feeding at Lake Monger by sweeping its bill through the water Yellow-billed Spoonbill.jpg
Yellow-billed spoonbill feeding at Lake Monger by sweeping its bill through the water

The yellow-billed spoonbill is carnivorous, catching small animals by sweeping its bill through shallow water and swallowing prey once it is detected. [5] When slow sweeping, the spoonbill walks with the bill at an angle at about 60 degrees to horizontal and with the bill tip open about 2 to 4 cm (1 to 1.5 in), sweeping an arc of around 120 degrees in front of the bird. The bird walks slowly, kicking up debris and small animals from the bottom of the water, which it then senses and catches with its bill. When an item is detected, the spoonbill switches to intensive sweeping of a small area. [6]

The yellow-billed spoonbill has a row of small blunt knobs known as papillae which line the margins of the upper and lower mandible of the "spoon". [6] These are sensory structures which help the bird sense vibration and hence seize its prey. [5]

One field study at Lake Cowal in New South Wales found the water depth selected for feeding to be less than 40 cm (15.5 in). As well as lakes and swamps, the birds feed in paddocks inundated after heavy rain. Foraging occurs both during the day and at night. [6]

Yellow-billed spoonbills also probe submerged plants directly for prey, and seize prey such as spiders above ground. They have been observed dragging their bills alongside themselves through shallow water while walking. [6]

Prey items recorded at Lake Cowal include freshwater crustaceans such as the common yabby (Cherax destructor); shrimp of the genus Macrobrachium and family Atyidae; insects, particularly aquatic bugs of the families Notonectidae and Corixidae; fish such as mosquitofish ( Gambusia affinis ) and flathead gudgeon ( Philypnodon grandiceps ); and occasionally freshwater snails and plant material such as medic burr ( Medicago polymorpha ). [6]

Breeding

Atkinson's Dam, SE Queensland, Australia

The yellow-billed spoonbill nests once or twice a year, generally when water is plentiful. The breeding season varies: it is usually March to May after the wet season in the north of the country, and in winter–spring (August to October) in more temperate areas. The nest is a platform constructed of sticks; it has a hollowed centre, and can be located on the branches or fork of a tree, the base of which is often submerged in water. Reed beds are another nest location. The clutch consists of two to four dull white eggs measuring 68 x 45 mm. Nests are often located in colonies, with other species such as the royal spoonbill, Australian white ibis, straw-necked ibis, as well as herons, egrets or cormorants. [7]

Related Research Articles

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

Spoonbills are a genus, Platalea, of large, long-legged wading birds. The spoonbills have a global distribution, being found on every continent except Antarctica. The genus name Platalea derives from Ancient Greek and means "broad", referring to the distinctive shape of the bill. Six species are recognised, which although usually placed in a single genus have sometimes been split into three genera.

<span class="mw-page-title-main">Threskiornithidae</span> Family of birds

The family Threskiornithidae includes 36 species of large wading birds. The family has been traditionally classified into two subfamilies, the ibises and the spoonbills; however recent genetic studies have cast doubt on this arrangement, and have found the spoonbills to be nested within the Old World ibises, and the New World ibises as an early offshoot.

<span class="mw-page-title-main">Heron</span> Family of birds

Herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 72 recognised species, some of which are referred to as egrets or bitterns rather than herons. Members of the genera Botaurus and Ixobrychus are referred to as bitterns, and, together with the zigzag heron, or zigzag bittern, in the monotypic genus Zebrilus, form a monophyletic group within the Ardeidae. Egrets do not form a biologically distinct group from herons, and tend to be named differently because they are mainly white or have decorative plumes in breeding plumage. Herons, by evolutionary adaptation, have long beaks.

<span class="mw-page-title-main">Eurasian spoonbill</span> Species of bird

The Eurasian spoonbill, or common spoonbill, is a wading bird of the ibis and spoonbill family Threskiornithidae. The genus name Platalea is from Latin and means "broad", referring to the distinctive shape of the bill, and leucorodia is from Ancient Greek leukerodios "spoonbill", itself derived from leukos, "white" and erodios "heron". In England it was traditionally known as the "shovelard", a name later used for the Northern Shoveller.

<span class="mw-page-title-main">African spoonbill</span> Species of bird

The African spoonbill is a long-legged wading bird of the ibis and spoonbill family Threskiornithidae. The species is widespread across Africa and Madagascar, including Botswana, Kenya, Mozambique, Namibia, South Africa, and Zimbabwe.

<span class="mw-page-title-main">Roseate spoonbill</span> Species of bird

The roseate spoonbill is a gregarious wading bird of the ibis and spoonbill family, Threskiornithidae. It is a resident breeder in both South and North America. The roseate spoonbill's pink color is diet-derived, consisting of the carotenoid pigment canthaxanthin, like the American flamingo.

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

The giant ibis is a wading bird of the ibis family, Threskiornithidae. It is confined to northern Cambodia, with a few birds surviving in extreme southern Laos and a recent sighting in Yok Đôn National Park, Vietnam. It is sometimes placed in the genus Thaumatibis.

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

The black-faced spoonbill is a species of wading bird in the ibis and spoonbill family Threskiornithidae, found in eastern Asia. This species has the most restricted distribution of the six spoonbill species, and it is the only one regarded as endangered. Spoonbills are large water birds with dorso-ventrally flattened, spatulate bills. These birds use a tactile method of feeding, wading in the water and sweeping their beaks from side-to-side to detect prey. Confined to the coastal areas of eastern Asia, it seems that it was once common throughout its area of distribution. It currently breeds only on a few small rocky islands off the west coast of North Korea, with four wintering sites at Macau, Hong Kong, Taiwan and Vietnam, as well as other places where they have been observed in migration. Wintering also occurs in Jeju, South Korea, Kyushu and Okinawa, Japan, and the Red River delta in Vietnam. More recently, sightings of black-faced spoonbill birds were noted in Thailand, the Philippines, and additional sites in China.

<span class="mw-page-title-main">Royal spoonbill</span> Species of bird

The royal spoonbill also known as the black-billed spoonbill, occurs in intertidal flats and shallows of fresh and saltwater wetlands in Australia, New Zealand, Indonesia, Papua New Guinea, and the Solomon Islands. It has also been recorded as a vagrant in New Caledonia. The royal spoonbill lives in wetlands and feeds on crustaceans, fish and small insects by sweeping its bill from side to side. It always flies with its head extended. Widespread throughout its large range, the royal spoonbill is evaluated as Least Concern on the IUCN Red List of Threatened Species.

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

The yellow-billed stork, sometimes also called the wood stork or wood ibis, is a large African wading stork species in the family Ciconiidae. It is widespread in regions south of the Sahara and also occurs in Madagascar.

<i>Eudocimus</i> Genus of birds

Eudocimus is a genus of ibises, wading birds of the family Threskiornithidae. They occur in the warmer parts of the New World with representatives from the southern United States south through Central America, the West Indies, and South America.

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

The plumbeous ibis, also formerly called the blue ibis, is a large distinctive ibis species endemic to parts of central South America.

References

  1. BirdLife International (2016). "Platalea flavipes". IUCN Red List of Threatened Species . 2016: e.T22697571A93621758. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22697571A93621758.en . Retrieved 19 November 2021.
  2. Gould, John (1865). Handbook to The birds of Australia, Volume 2. self. pp. 288–89.
  3. Chesser, R.Terry; Yeung, Carol K.L.; Yao, Cheng-Te; Tians, Xiu-Hua; Li Shou-Hsien (2010). "Molecular phylogeny of the spoonbills (Aves: Threskiornithidae) based on mitochondrial DNA". Zootaxa. 2603 (2603): 53–60. doi:10.11646/zootaxa.2603.1.2. ISSN   1175-5326.
  4. 1 2 Slater, Peter (1970). A Field Guide to Australian Birds: Vol.1. Non-passerines. Adelaide: Rigby. p. 225. ISBN   978-0-85179-102-9.
  5. 1 2 3 4 Birds Australia (21 December 2005). "Yellow-billed Spoonbill". Birds in Backyards. Sydney, New South Wales: Australian Museum. Retrieved 19 August 2011.
  6. 1 2 3 4 5 6 Vestjens, W. J. M. (1975). "Feeding behaviour of Spoonbills at Lake Cowal, NSW". Emu. 75 (3): 132–136. doi:10.1071/MU9750132.
  7. Beruldsen, Gordon (2003). Australian Birds: Their Nests and Eggs. Kenmore Hills, Qld: self. p. 180. ISBN   978-0-646-42798-0.