Hoary-headed grebe | |
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breeding plumage | |
non-breeding plumage | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Podicipediformes |
Family: | Podicipedidae |
Genus: | Poliocephalus |
Species: | P. poliocephalus |
Binomial name | |
Poliocephalus poliocephalus | |
Distribution of the hoary-headed grebe |
The hoary-headed grebe (Poliocephalus poliocephalus) is a member of the grebe family. It breeds in southern parts of Australia; it winters throughout the island of Tasmania. The bird takes its name from the silvery-white streaking on its black head. It is common in Australia, with a population of about 500,000. Its habitat is similar to that of the Australasian grebe .
The hoary-headed grebe is a fairly small dark grey and white grebe. It has a brown eye and a black patch under the chin, and a narrow black streak down the back of the neck. During the breeding season the adult's plumage has white streaks over its entire head, giving them the common name of hoary-headed grebe. Juveniles have a white chin and throat and a striped face. [2] Males have two plumage phases: after breeding they lose the buff breast and the white lines on the head, but can usually be identified then by the broad black bar down the nape. [3]
The hoary-headed grebe is found in all states and territories of Australia. It is generally absent from the central arid regions of Australia. [4] The hoary-headed grebe is usually found away from the shoreline in large open waters, which may be estuarine, brackish or freshwater. [5] It can also be found in sheltered coastal seas. [6] It can sometimes be found in New Zealand, where it is much less common than Australia. [7]
The hoary-headed grebe feeds on aquatic arthropods, mostly caught by deep diving. This species feeds during the day, and when the light is poor, forages mostly at the water surface. [8]
Hoary-headed grebes breed from August to January. The nests are a floating platform of water weeds, similar to that of the Australasian grebe, and usually some distance out from shore among sparse reeds or other plants, anchored to and at least partly supported by them. A shallow depression on top is just slightly above water, so the eggs are lying in water or dampness. The eggs are concealed under pieces of wet vegetation when the incubating parent leaves so that the nest appears empty. Under full sun the covered eggs are warm and moist, often left unattended for some time. The egg's appearance is oval, white, and soon stained brownish ochre, while the clutch is usually 2–5 eggs. Incubation is 20–24 days and egg size is 39 x 27 mm. [9]
With a large range and no evidence of significant population decline, this species’ conservation status is of Least Concern.
The horned grebe or Slavonian grebe is a relatively small and threatened species of waterbird in the family Podicipedidae. There are two subspecies: P. a. auritus, which breeds in Eurasia, and P. a. cornutus, which breeds in North America. The Eurasian subspecies is distributed over most of northern Europe and northern Asia, breeding from Greenland east to the Russian Far East. The North American subspecies spans most of Canada and some of the United States. The species got its name from large patches of yellowish feathers located behind the eyes, called "horns", that the birds can raise and lower at will..
The black-necked grebe or eared grebe is a member of the grebe family of water birds. It was described in 1831 by Christian Ludwig Brehm. There are currently three accepted subspecies, including the nominate subspecies. Its breeding plumage features distinctive ochre-coloured feathers which extend behind its eye and over its ear coverts. The rest of the upper parts, including the head, neck, and breast, are coloured black to blackish brown. The flanks are tawny rufous to maroon-chestnut, and the abdomen is white. In its non-breeding plumage, this bird has greyish-black upper parts, including the top of the head and a vertical stripe on the back of the neck. The flanks are also greyish-black. The rest of the body is a white or whitish colour. The juvenile has more brown in its darker areas. The subspecies californicus can be distinguished from the nominate by the former's usually longer bill. The other subspecies, P. n. gurneyi, can be differentiated by its greyer head and upper parts and by its smaller size. P. n. gurneyi can also be told apart by its lack of a non-breeding plumage. This species is present in parts of Africa, Eurasia, and the Americas.
The little grebe, also known as dabchick, is a member of the grebe family of water birds. The genus name is from Ancient Greek takhus "fast" and bapto "to sink under". The specific ruficollis is from Latin rufus "red" and Modern Latin -collis, "-necked", itself derived from Latin collum "neck".
The striated pardalote is the least colourful and most common of the four pardalote species. Other common names include pickwick, wittachew and chip-chip. It is a very small, short-tailed bird that is more often heard than seen, foraging noisily for lerps and other small creatures in the treetops.
The New Zealand grebe, also known as the New Zealand dabchick or weweia, is a member of the grebe family endemic to New Zealand.
The crested pigeon is a bird found widely throughout mainland Australia except for the far northern tropical areas. Only two Australian pigeon species possess an erect crest, the crested pigeon and the spinifex pigeon. The crested pigeon is the larger of the two species. The crested pigeon is sometimes referred to as a topknot pigeon, a common name shared with the reddish crested Lopholaimus antarcticus of Eastern Australia.
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.
The little friarbird, also known as the little leatherhead or yellow-throated friarbird, is the smallest of the friarbirds within the Philemon genus. It is found throughout northern and eastern Australia as well as southern Papua New Guinea. It lives a very prominent life, whereby it can easily be seen chasing other honeyeaters, and also it is very vocal. However, the little friarbird is usually spotted high up in trees, rarely being seen on the ground.
The black-faced cormorant, also known as the black-faced shag, is a medium-sized member of the cormorant family. Upperparts, including facial skin and bill, are black, with white underparts. It is endemic to coastal regions of southern Australia.
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 buff-breasted paradise kingfisher is a bird in the tree kingfisher subfamily, Halcyoninae. It is native to Australia and New Guinea. It migrates in November from New Guinea to its breeding grounds in the rainforest of North Queensland, Australia. Like all paradise kingfishers, this bird has colourful plumage with a red bill, buff breast and distinctive long tail streamers.
The Australian pipit is a fairly small passerine bird of open country in Australia and New Guinea. It belongs to the pipit genus Anthus in the family Motacillidae.
The oriental plover, also known as the oriental dotterel, is a medium-sized plover closely related to the Caspian plover. It breeds in parts of Mongolia and China, migrating southwards each year to spend its non-breeding season in Indonesia, New Guinea and northern Australia.
The red-kneed dotterel is a species of plover in a monotypic genus in the subfamily Vanellinae. It is often gregarious and will associate with other waders of its own and different species, even when nesting. It is nomadic and sometimes irruptive.
The brown treecreeper is the largest Australasian treecreeper. The bird, endemic to eastern Australia, has a broad distribution, occupying areas from Cape York, Queensland, throughout New South Wales and Victoria to Port Augusta and the Flinders Ranges, South Australia. Prevalent nowadays between 16˚S and 38˚S, the population has contracted from the edges of its pre-European range, declining in Adelaide and Cape York. Found in a diverse range of habitats varying from coastal forests to mallee shrub-lands, the brown treecreeper often occupies eucalypt-dominated woodland habitats up to 1,000 metres (3,300 ft), avoiding areas with a dense shrubby understorey.
The rufous fieldwren also known as the desert wren or sandplain wren is a species of insectivorous bird in the family Acanthizidae, endemic to Australia.
The rockwarbler, is a bird in the family Acanthizidae. It is the only bird species endemic to the mainland of the state of New South Wales in Australia.
The chirruping wedgebill is a medium-sized member of the genus Psophodes, which consists or four to five songbirds endemic to Australia. Commonly found in low shrublands in south-eastern inland Australia, the species is distinguished by its distinctive, chirruping call. The chirruping wedgebill and chiming wedgebill were considered to be a single species until as late as 1973, when they were separated due to marked differences in their calls.
The Australian pratincole 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.
The grey noddy or grey ternlet is a seabird belonging to the family Laridae. It was once regarded as a pale morph of the blue noddy but is now usually considered to be a separate species.