Australian pratincole | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Charadriiformes |
Family: | Glareolidae |
Genus: | Stiltia G.R. Gray, 1855 |
Species: | S. isabella |
Binomial name | |
Stiltia isabella (Vieillot, 1816) | |
The Australian pratincole (Stiltia isabella) is a species of bird in the family Glareolidae. It breeds in Australia's interior and winters in northern and eastern parts of the continent, Indonesia and New Guinea. It is a medium-sized nomadic shorebird but is commonly found in arid inland Australia. It breeds predominantly from south-western Queensland to northern Victoria, and through central Australia to the Kimberley region in Western Australia. The Australian population is estimated at 60,000 individuals.
They are a migratory species that generally move to the southern parts of their distribution range to breed during spring and summer. During winter they migrate to northern Australia, New Guinea, Java, Sulawesi and southern Borneo. [2] Although they are common, their occurrence is unpredictable and varies in location. [3]
The Australian pratincole belongs to the family Glareolidae. It is monotypic within the genus Stiltia. [4]
The pratincole is also known as the Arnhem Land grouse, Australian courser, roadrunner (not to be confused with the genus of North American cuckoos, Geococcyx ), nankeen plover and swallow-plover. [5]
The Australian pratincole is a medium-sized slender shorebird with long legs, long pointed wings and a short decurved bill. It is 19–24 cm (7.5–9.4 in) long, has a wingspan of 50–60 cm (20–24 in) and weighs 55–75 g (1.9–2.6 oz). [5]
The sexes look alike but their breeding and non-breeding plumage differs.
In their breeding plumage, the head, neck, breast and upperparts are a sandy brown grading. The wings are pointed and black and there is a black loral strip. The chin and throat are white and the breast is a sandy brown. [5] The bill is bright red with a black base and the iris is dark brown. Their legs and feet are grey to black. [2]
Their non-breeding plumage is not well known, because there are seasonal and individual variations. The loral stripe is fainter than when in breeding plumage, and the base of the bill is paler. [2] The upper parts are grey-brown with sandy-buff fringes. Sometimes there are dark flecks at the borders of the pale throat. [5]
Juvenile plumage is similar to a non-breeding adult but a slightly paler sandy brown colour. The lores lack the black colour and the forehead, crown and nape are streaked dark brown. The bill is grey-black with a faint reddish base. [2]
In flight, the upper body and inner wing are sandy brown with black on the outer wing. The tail is square-cut, and the upper-tail coverts and sides of the tail are white. [2]
The Australian pratincole is slightly slimmer and smaller in size than oriental pratincole (Glareola maldivarum), with longer legs. [2] Juveniles with worn plumage and birds in non-breeding plumage can also be confused with the oriental pratincole. [5]
The habitat of the Australian pratincole is treeless, open and sparsely wooded plains, grasslands, claypans and gibberstone. [3] Most of those areas are in arid and semi-arid rainfall zones. The birds can also be found around the margins of wetlands, creeks, river beds, bore drains, lagoons, springs, claypans and sewage farms. During the breeding season, they inhabit low, scattered shrubland, because the chicks use the vegetation to hide and shelter in. [5]
The diet of the Australian pratincole consists mainly of insects, spiders and centipedes. Insects are caught either hawking in the air or pecked from the surface of the ground. When foraging on the ground, the birds stalk their prey, then dart forward to catch the prey, sometimes with one wing outspread. They actively forage during the day, with peak periods at dawn and dusk. [5] They require drinking water because they thermoregulate by evaporation from the mouth. They have salt glands, so both saline and ephemeral water can be drunk. [6]
They are a monogamous species, with pairs staying together during the breeding season. They usually lay two eggs in a scrape on bare ground. [5] Sometimes, in a dry season, only one egg is laid. [7] If the ground is soft, the birds will make a shallow depression. The nests are sometimes ringed with small stones or sheep droppings. They are sometimes lined with small pebbles, dry plant material or rabbit droppings. [5] The eggs are light cream to stony brown in colour, with short wavy streaks and irregularly shaped spots of brownish black, intermingled with smaller underlying bluish-grey markings which are evenly distributed . [5] The egg measure approximately 31mm x 24mm. [7]
Both sexes have been observed to incubate the eggs and care for the chicks. The young are semi-precocial and downy, with sandy buff with black markings. At approximately 10 days, feathers start to appear and, at three weeks of age they are fully feathered, with similar colouration to that of a non-breeding adult. The parents continue to feed the young until they are able to fly at four or five weeks. [5]
They are known to gather in flocks to migrate, and calls heard continuously within the flock. [5]
When the birds first arrive in the breeding grounds they appear to already be paired. At that time, the birds appear to be maintaining their bonds and possibly enter into courtship rituals. It appears that the nest site selection is part of the pair-bond ritual, with both sexes involved equally. They have been observed running to a spot where one sits down and shuffles its belly and throws small objects sideways. The mate watches, then selects another spot and repeats the ritual. [5]
After hatching, the chicks are led by the parents to nearby cover or refuge. However, some chicks stay in the nest for one day. The parents feed the chicks, flying from up to 1 km (0.62 mi) away with food in their bill. The chicks run out to be fed, probably in response to calls by the parents. [5]
The Australian pratincole has a repertoire of displays to distract threats, including:
The Australian pratincole is known to call during summer thunderstorms. The calls are sweet or plaintive whistles, or very soft and muted trills and loud sharp notes. No difference in calls between males and females has been identified. [5]
Four different types of calls have been clearly identified:
The crab-plover or crab plover is a bird related to the waders, but sufficiently distinctive to merit its own family Dromadidae. Its relationship within the Charadriiformes is unclear, some have considered it to be closely related to the thick-knees, or the pratincoles, while others have considered it closer to the auks and gulls. It is the only member of the genus Dromas and is unique among waders in making use of ground warmth to aid incubation of the eggs.
The pratincoles or greywaders are a subfamily (Glareolinae) of birds which together with the coursers make up the family Glareolidae. They have short legs, very long pointed wings and long forked tails.
The black-shouldered kite, also known as the Australian black-shouldered kite, is a small raptor found in open habitats throughout Australia. It resembles similar species found in Africa, Eurasia and North America, including the black-winged kite, a species that has in the past also been called "black-shouldered kite". Measuring around 35 cm (14 in) in length, with a wingspan of 80–100 cm (31–39 in), the adult black-shouldered kite has predominantly grey-white plumage and prominent black markings above its red eyes. It gains its name from the black patches on its wings. The primary call is a clear whistle, uttered in flight and while hovering. It can be confused with the related letter-winged kite in Australia, which is distinguished by the striking black markings under its wings.
The cream-colored courser is a wader in the pratincole and courser family, Glareolidae. Both parts of the scientific name derive from Latin cursor, "runner", from currere, "to run" which describes their usual habit as they hunt their insect prey on the ground in dry open semi-desert regions of the Middle East and northern Africa.
The small pratincole, little pratincole, or small Indian pratincole is a small wader in the pratincole family, Glareolidae.
Kittlitz's plover is a small shorebird in the family Charadriidae that breeds near coastal and inland saltmarshes, sandy or muddy riverbanks or alkaline grasslands with short vegetation. It is native to much of Sub-Saharan Africa, the Nile Delta and Madagascar. It is thought to be mainly polygamous and has monomorphic plumage.
The white-fronted tern, also known as tara, sea swallow, black-billed tern, kahawai bird, southern tern, or swallow tail, was first described by Johann Friedrich Gmelin in 1789. A medium-sized tern with an all-white body including underwing and forked tail, with grey hues on the over the upper side of the wing. In breeding adults a striking black cap covers the head from forehead to nape, leaving a small white strip above the black bill.
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.
Burchell's courser is a wader in the pratincole and courser family, Glareolidae. The name of this bird commemorates the English naturalist William John Burchell.
The red-necked avocet 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. It appeared on a 13 cent postage stamp in 1966.
The white-necked heron or Pacific heron is a species of heron that is found on most of the Australian continent wherever freshwater habitats exist. It is also found in parts of Indonesia and New Guinea, but is uncommon in Tasmania. The populations of this species in Australia are known to be nomadic like most water birds in Australia, moving from one water source to another, often entering habitats they have not previously occupied, taking advantage of flooding and heavy rain where the surplus of food allows them to breed and raise their young. Irruptive movements may occur when environmental conditions are right in places where the species has been rare or absent.
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.
The river lapwing is a lapwing species which breeds from the Indian Subcontinent eastwards to Southeast Asia. It range includes much of northern and northeastern India, and extends through Southeast Asia to Vietnam. It appears to be entirely sedentary. Formerly also called spur-winged lapwing, this name is better reserved for one of the "spur-winged plovers" of old, Vanellus spinosus of Africa, whose scientific name it literally translates. The masked lapwing of Australasia was at one time also called "spur-winged plover", completing the name confusion.
The red-winged fairywren is a species of passerine bird in the Australasian wren family, Maluridae. It is non-migratory and endemic to the southwestern corner of Western Australia. Exhibiting a high degree of sexual dimorphism, the male adopts a brilliantly coloured breeding plumage, with an iridescent silvery-blue crown, ear coverts and upper back, red shoulders, contrasting with a black throat, grey-brown tail and wings and pale underparts. Non-breeding males, females and juveniles have predominantly grey-brown plumage, though males may bear isolated blue and black feathers. No separate subspecies are recognised. Similar in appearance and closely related to the variegated fairywren and the blue-breasted fairywren, it is regarded as a separate species as no intermediate forms have been recorded where their ranges overlap. Though the red-winged fairywren is locally common, there is evidence of a decline in numbers.
The rock pratincole is a species of bird in the family Glareolidae.
The bronze-winged courser or violet-tipped courser is a species of bird in the family Glareolidae. This species is named for its characteristic bronze-tipped feathers that are visible during flight. It is found living throughout Sub-Saharan Africa, inhabiting semi-arid savannas and woodlands. This is a nocturnal species which mainly feeds on ground-dwelling insects. Bronze-winged coursers are typically solitary, only forming monogamous pairs for breeding. A female may produce 2-3 eggs per clutch, and the chicks receive parental care from both sexes when young. The bronze-winged courser is considered of Least Concern for conservation status, and is thought to be a very stable species.