Overview

Brief Summary

Biology

Male lyrebirds take part in complex displays in order to attract a mate; these take place on platforms constructed from trampled vegetation on the forest floor (4). Whilst giving a range of calls, the male fans his striking tail and arches it over his back (3). Displays take place between May and August. After mating the female constructs a domed nest of sticks, into which she lays a single egg, which she then incubates alone (4).   Using their strong feet and claws, lyrebirds unearth invertebrates, such as spiders and insects on the forest floor (4). These unusual birds have weakly developed wings and rarely fly, even if disturbed (4).
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Description

Lyrebirds are well known for the male's impressive courtship display, in which he shows off his magnificent tail. Albert's lyrebirds have deep chestnut upperparts, with a reddish-buff throat and foreneck (2). Males have an extremely long tail that can reach 50 cm, and is glossy black above and silvery-grey below (2). Lyrebirds are astonishing mimics, giving calls that sound like other rainforest animals and even man-made cars and chainsaws (4).
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Distribution

Range Description

Menura alberti is confined to a relatively small area of rainforest between Blackwall Range, New South Wales, and Mistake Range, Queensland, Australia. New South Wales is thought to support less than 800 pairs, with highest densities at Whian Whian State Conservation Area in Nightcap Range. Subpopulations are also found along Tweed, McPherson and Richmond Ranges. An isolated group of less than 10 birds persists in the Blackwall Range. In Queensland, the population may be of a similar size, although possibly smaller, and occurs patchily from Lamington National Park around Main Range to Mistake Range, with a small population on Tamborine Mountain. In optimal habitat, territories are widely spaced with a density of approximately five pairs/km2.

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Range

Rainforests of e Australia (se Queensland and extreme ne NSW.
  • Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/

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Range

Endemic to Australia, Albert's lyrebird is now restricted to mountainous areas between the Nightcap Range in northeast New South Wales and the Mistake Range, southeast Queensland (3).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
It lives in moist forest, mostly above 300 m with highest densities on poorer soils which develop a deep leaf-litter. It favours areas with Antarctic Beech Nothofagus moorei and wet sclerophyll forest with a dense understorey of rainforest plants, but is absent from some rainforest types, including complex notophyll vine forest on high nutrient soils and from dry sclerophyll forest. It feeds on terrestrial invertebrates.


Systems
  • Terrestrial
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These rainforest birds are found in forests above 300 metres, where there is a dense understory; they are particularly associated with Antarctic beech (Nothofagus moorei) (2).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
NT
Near Threatened

Red List Criteria

Version
3.1

Year Assessed
2012

Assessor/s
BirdLife International

Reviewer/s
Butchart, S. & Symes, A.

Contributor/s
Baker, B., Burbidge, A., Dutson, G., Ford, H., Garnett, S., Gynther, I., Herman, K. & Woinarski, J.

Justification
This species is listed as Near Threatened as although it is restricted to a small range and number of locations and the number of individuals is small, favourable management (including protection of the most important population) has meant that habitat quality and numbers are not thought to be declining. Regular monitoring of both species and habitat is needed to confirm the continuing effectiveness of this management.

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Status

Classified as Vulnerable (VU – B1+2ce) on the IUCN Red List 2002 (1).
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Population

Population
Garnett and Crowley (2000).


Population Trend
Decreasing
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Threats

Major Threats
Much of the species's habitat was cleared in the 19th century. Until recently, the major threat was intense forest management, particularly in what was Whian Whian State Forest where proposals existed to allow replacement of optimal wet sclerophyll habitat with unsuitable Eucalyptus plantations. This area is now protected in the Whian Whian State Conservation Area (I. Gynther in litt. 2007). Previously disturbed areas may support a dense growth of lantana Lantana camara which reduces habitat suitability. Most subpopulations are now under relatively secure tenure, although the isolated populations at Blackwall Range and Tamborine Mountain are threatened simply because they are so small, and densities are unusually low near areas of closer settlement. Greater protection of suitable habitat on private land is occurring through the establishment of voluntary conservation agreements and this will help secure some subpopulations. Fire could be a threat in exceptionally dry years, especially to outlying subpopulations, although fire at intervals of several centuries is a natural feature of these environments. Nevertheless, the impacts of climate change on fire frequency and intensity, as well as on habitat quality in general, may need to be considered for the species in the future.

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This area of eastern Australia was witness to much deforestation in the 19th century. Today the major threats to the survival of Albert's lyrebird come from forest management practices, such as proposed Eucalyptus plantations (2). Albert's lyrebird is a rainforest specialist, which appears unable to disperse between areas of unsuitable habitat. The resulting isolated subpopulations are at risk from disease or natural disasters, such as the fires that periodically sweep through the region (3).
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Management

Conservation Actions

Conservation Actions
Conservation Actions Underway
A study of the habitat distribution and population density has been completed. Whian Whian State Forest, which was formerly threatened with conversion to Eucalyptus plantations, became protected as part of the Whian Whian State Conservation Area in July 2003. Voluntary conservation agreements on private land have given greater protection to suitable habitat (including Nature Refuge designation in Queensland), several state forests where the species occurs have been converted to national park status in Queensland, and a Border Ranges Rainforest Biodiversity Management Plan has been developed, encompassing the entire distribution of the species and identifying actions to enhance the quality and extent of habitat.

Conservation Actions Proposed
Determine the extent of isolation between forest patches. Undertake habitat restoration to provide greater extent and quality of habitat and improved connectivity between remnants. Protect more habitat on private land through voluntary conservation agreements. Carry out regular population monitoring. Ensure adequate fire protection is in place, particularly in dry years.

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Conservation

Population studies have been carried our in order to assess the precise risk to this species (2). The protection of the limited viable habitat that remains will be vital in securing the survival of this intriguing bird. The lyrebird is the emblem of the New South Wales National Parks and Wildlife Service (4).
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Wikipedia

Albert's lyrebird

Albert's lyrebird (Menura alberti) is a timid, pheasant-sized songbird which is endemic to subtropical rainforests of Australia, in a small area on the state border between New South Wales and Queensland.

The rarer of the two species of lyrebirds, Albert's lyrebird is named after Prince Albert, the prince consort of Queen Victoria, queen of the United Kingdom. It lacks the elegant lyre-shaped tail feathers of the superb lyrebird and is found in a much more restricted range.

in the past, Albert's lyrebirds were shot to be eaten in pies, to supply tail-feathers to "globe-trotting curio-hunters" or by vandals.[2]

The total population of Albert's lyrebirds is estimated at only 3,500 breeding birds [3] and it has one of the smallest distributional ranges of any bird on the continent.[4]

Description[edit]

Albert’s lyrebird is a ground-dwelling bird with the female reaching approximately 75 cm in length and males 90 cm. They have a wingspan of 76–79 cm and weigh about 930 grams. They are chestnut-brown in colour with a rufous undertail, rump and throat. The bill is black; the iris dark brown or black, and it has a broad, blue-grey ring around the eye. The legs and feet are brownish grey to dark grey or black.[5]

The sexes are alike except for the shape of the tail. The male has a spectacular tail composed of: (1) a central pair of long ribbon-like dark-brown median plumes; (2) six pairs of long, filmy and luxuriant filamentary feathers, which are black-brown above and dark grey below; and (3) a long broad fully webbed outermost pair of lyrates, which are black-brown above and dark grey below.[6]

The tail of the female is shorter, simpler, slightly drooping and appears more pointed when closed; it is composed of a pair of long, narrow and tapered median plumes, and fully webbed broad brown feathers with rounded tips, but lacks filamentaries. When walking, the male carries its tail in an upward-curving train.[7]

Juveniles are separable from adults at close range. They are similar to the adult female, but can be distinguished by: (1) the richer and more uniform rufous-brown colouring on the chin, throat and foreneck, and brighter red-brown wash on the forehead and forecrown; (2) the slightly paler upperbody; (3) the softer, downy texture of the rump, lower belly and vent feathers; and, most importantly, (4) the tail feathers (excluding the central pair of medians) are distinctly narrower, more tapered and pointed.[8]

Voice[edit]

Both this species and the superb lyrebird have powerful, flexible voices and use a mixture of their own calls and mimicry of other species in long unbroken passages of song. In comparison to the superb lyrebird, the Albert's lyrebird limits its mimicry to a smaller range of species, with the green catbird and satin bowerbird featuring strongly in its imitations,[9] as well as whipbirds and rosellas.

The voice can create sounds at one moment deep and resonant, switch to high thin squeaks and trills, then change again to harsh noises. Some of the passages of song begin with a soft, mellow sound that rises clearer and louder, which has been likened to the howl of a dingo.[10]

The males call for many hours a day during the peak of the winter breeding season and are quiet at other times. In alarm, the birds give a shrill shriek. Even when calling strongly, this shy and elusive species is not easily sighted in the dense tangled vegetation of its habitat with dim light and the birds notoriously wary.[11]

Habitat and distribution[edit]

The extent of the Albert lyrebird's distribution has apparently declined significantly following European settlement. Much of the lyrebird's habitat was cleared during the 19th century.[12] Although the species was still widespread in lowland areas at the beginning of the 20th century,[13] the continued clearing of habitat since then has driven most populations into higher altitude forests, usually at least 300 metres above sea level.[14][15]

The bird's distribution is now restricted to several small areas of mountain ranges in the vicinity of far south-east Queensland and far north-east New South Wales; with much of the remaining habitat occurring in reserves. In Queensland, the Albert's lyrebird is found from Tamborine Mountain and Springbrook National Park in the east, to the McPherson Range in the west. Isolated populations exist in Mount Barney National Park and on the Main Range. The largest single population is found on the Lamington Plateau. Albert's lyrebirds were formerly recorded from the Sunshine Coast hinterland and from the D'Aguilar Ranges but have since disappeared from these areas.

In New South Wales it is found only in the far north of the Northern Rivers region, along the Border Ranges and in Nightcap National Park in the east, possibly as far west as Koreelah National Park. A large concentration is found in the Mount Warning area. Isolated populations may still exist in remnant rainforest patches as far south as Wardell.

The birds have a preference for rainforest with a dense understorey of vines and shrubs, or wet sclerophyll forest with a dense understorey of rainforest plants, including temperate rainforest. They are occasionally recorded in areas with mixed eucalypt forest, with a mesic understorey, around gullies and lower slopes, and with small amounts of rainforest in wet gullies.[16]

The composition of plant species within these forests does not appear to be important except that a canopy of eucalypts is always associated with higher population densities when compared to rainforests that lack eucalypts (at sites with equivalent climates). Population densities increase along a gradient of increasing rainfall and decreasing mean annual temperature; with decreasing moisture index, the density of males declines and individuals become increasingly restricted to areas around gullies. In comparisons of wet sclerophyll forest and rainforest with equivalent climate and moisture index, higher densities always occur in wet sclerophyll forest and are associated with the greater weights of litter and logs and slower rates of litter decomposition.[17]

Steep moist valleys and other areas that are physically or geographically protected from wildfire are likely to offer important refuge habitat.[18]

Albert's lyrebird usually occurs singly or in pairs, or rarely in groups of three. It is sedentary (non-migratory), and remains in the same general area year-round. Males are territorial during the breeding season.[19] Females seem to have their own separate territories, which partly overlap that of the male, and which they defend as feeding grounds rather than as the centre of a mating site.[20] Data on territory sizes has only been recorded for males. Male territories are said to usually comprise an area of 5-15 ha.[21]

Breeding and life cycle[edit]

The mating system of Albert's lyrebird is unknown;[22] although the male courtship display has been well documented. The male birds use a flat piece of ground from which all debris has been raked for a stage, rather than a mound of debris as used by the superb lyrebird. In display, the male initially raises his tail to arch forwards above the head, then gradually lowers and shimmers it forwards until the bird is enveloped beneath the veil of fine bushy filaments, these are silvery with the shiny white underside of the plumes uppermost.[23] There is no evidence of any lasting pair-bond between the male and female.[24]

Throughout the species' range, eggs have been recorded from late May to mid-August. They nest beneath the canopy, usually in the darkest areas of the forest. Nests are often located in rocky areas, usually on ledges, in clefts or between rocks, or occasionally in caves, on rock or cliff-faces, or in deep rocky ravines; nests in such places are sometimes located near waterfalls. Nests may also be placed in a variety of other sites, including on the ground on steep slopes, on creek banks, between buttress roots of fig ficus trees, amongst tree stumps, at the base of palm trees, amongst ferns, in dense shrubs or occasionally in tree forks.[25]

Females sometimes nest close to sites used the previous year; occasionally, nest-sites may be re-used. The female alone builds the dome-shaped nest, which has a side entrance; it is composed of sticks, fern fronds, rootlets, bark, pieces of palm leaf and moss, and is lined with moss, fine plant material and feathers. Construction of the nest may take at least three weeks.[26] The overall appearance is rather like a pile of accumulated rainforest debris, which make the nest quite inconspicuous.[27]

Clutch-size is a single egg. The eggs can vary greatly in colour and, sometimes, shape, but are usually shaded brown or grey with spots and blotches, and sometimes other markings, of varying tones of brown and grey. The female incubates the eggs and feeds and broods the nestlings without any help from the male. The young fledge at approximately five and a half weeks. No information is available on breeding success, but it is claimed that a maximum of one brood may reared in a season.[28][29]

Feeding[edit]

Lamington National Park, south-east Queensland, Australia

Albert's lyrebird appears to feed mainly on insects (including beetles) and their larvae, and other soil-dwelling invertebrates. They usually find food on the ground, particularly in areas with deep moist leaf litter and fallen logs,[30] but they also forage occasionally in epiphytic ferns.[31] They typically forage in areas that are rather open and lack dense shrub cover but have well developed taller strata. When foraging on the ground they scratch among debris, turn over leaves and dig into soil in search of invertebrate prey;[32] birds foraging in ephiphytes were observed scratching and pecking.[33]

Threats[edit]

In New South Wales, the birds are listed as vulnerable under the Threatened Species Conservation Act 1995 (New South Wales)(as of December 2013) and in Queensland they are listed as near threatened under the Nature Conservation Act 1992 (Queensland) (as of July 2012).[34]

The major threats to Albert's lyrebird include the intense management of forests and the replacement of optimal habitat with plantations of unsuitable species such as eucalypts or hoop pines;[35] invasion of logged or otherwise damaged habitat by weeds, especially Lantana camara, which reduces suitability of the habitat; damage to habitat by grazing stock; encroachment of urban or rural development close to habitat of Albert's lyrebirds; and predation by introduced red foxes (Vulpes vulpes), feral dogs and cats, and domestic dogs and cats where the birds are located close to human settlements.[36]

Some isolated populations are threatened simply because they are so small, and because population densities are lower than expected in optimal habitats close to areas of human settlement.[37]

Global warming and its anticipated effects (habitat change, alteration to fire frequency/intensity) could be a potential threat to the lyrebird in the future and large-scale fires could potentially impact upon the entire population.[38]

Because the range of the species is confined to such a small geographic area, a threatening event such as a severe regional drought has the potential to affect all individuals.[39]

References[edit]

  1. ^ BirdLife International (2012). "Menura alberti". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013. 
  2. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Thu, 27 Mar 2014
  3. ^ Garnett, S.T. & G.M. Crowley (2000). The Action Plan for Australian Birds 2000. [Online]. Canberra, ACT: Environment Australia and Birds Australia. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/action/birds2000/index.html.
  4. ^ Gilmore, A. (2000). Distributional ecology of the Albert's Lyrebird, Menura alberti, in north-east New South Wales. Astheimer, L.B. & M.F. Clarke, eds. The 2nd Southern Hemisphere Ornithological Congress. Birds Australia Report Series 9. Page(s) 65.
  5. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 5 Apr 2014 10:53:27 +1100.
  6. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 5 Apr 2014 10:53:27 +1100.
  7. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press.
  8. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press.
  9. ^ Morcombe, M, 2003: p214 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  10. ^ Morcombe, M, 2003: p214 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X.
  11. ^ Morcombe, M, 2003: p214 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  12. ^ Garnett, S.T. & G.M. Crowley (2000). The Action Plan for Australian Birds 2000. [Online]. Canberra, ACT: Environment Australia and Birds Australia. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/action/birds2000/index.html.
  13. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press.
  14. ^ Curtis, H.S. (1998). Lyrebirds: Veiled in secrecy. Nature Australia. 26:32-41.
  15. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press.
  16. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  17. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  18. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 5 Apr 2014 10:53:27 +1100.
  19. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  20. ^ Morcombe, M, 2003: p384 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  21. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 5 Apr 2014 10:53:27 +1100.
  22. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Thu, 27 Mar 2014
  23. ^ Morcombe, M, 2003: p215 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  24. ^ Morcombe, M, 2003: p215 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  25. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  26. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  27. ^ Morcombe, M, 2003: p384 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  28. ^ Morcombe, M, 2003: p384 Australia: Steve Parish Publishing 2nd edition ISBN 174021417X
  29. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  30. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  31. ^ Loyn, R.H. & J.A. Loyn (2002). Albert's lyrebird foraging from epiphytes in rainforest sub-canopy. Australian Bird Watcher. 19:203-4.
  32. ^ Higgins, P.J., J.M. Peter & W.K. Steele, eds. (2001). Handbook of Australian, New Zealand and Antarctic Birds. Volume 5: Tyrant-flycatchers to Chats. Melbourne, Victoria: Oxford University Press
  33. ^ Loyn, R.H. & J.A. Loyn (2002). Albert's lyrebird foraging from epiphytes in rainforest sub-canopy. Australian Bird Watcher. 19:203-4.
  34. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Thu, 27 Mar 2014
  35. ^ Garnett, S.T. & G.M. Crowley (2000). The Action Plan for Australian Birds 2000. [Online]. Canberra, ACT: Environment Australia and Birds Australia. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/action/birds2000/index.html.
  36. ^ NSW Government, Department of Environment and Heritage, 2013 "Albert's Lyrebird Profile" Available at http://www.environment.nsw.gov.au/threatenedspeciesapp/profile.aspx?id=10525 Accessed Thu, 27 March 2014.
  37. ^ Garnett, S.T. & G.M. Crowley (2000). The Action Plan for Australian Birds 2000. [Online]. Canberra, ACT: Environment Australia and Birds Australia. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/action/birds2000/index.html; Gilmore, A. (2000). Distributional ecology of the Albert's Lyrebird, Menura alberti, in north-east New South Wales. Astheimer, L.B. & M.F. Clarke, eds. The 2nd Southern Hemisphere Ornithological Congress. Birds Australia Report Series 9. Page(s) 65.
  38. ^ Department of the Environment (2014). Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Thu, 27 Mar 2014
  39. ^ Department of the Environment (2014).Menura alberti in Species Profile and Threats Database, Department of the Environment, Canberra. Available from:http://www.environment.gov.au/sprat. Accessed Sat, 5 Apr 2014 10:53:27 +1100
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