About Orange-bellied Parrots

​​​​​The Orange-bellied Parrot (OBP; Neophema chrysogaster) is listed as ‘Critically Endangered’ under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999, and is also listed as a threatened species in New South Wales, South Australia, Tasmania and Victoria.

With less than 70 of these rare and beautiful birds left in the wild, the OBP is one of the most threatened birds in Australia.

Identifying features

Orange-bellied Parrot. Photo: DPIPWE

The OBP is one of six species of Neophema or grass parrot. They are approximately 20 cm long and weigh approximately 40 g a little larger than a budgerigar.

OBPs are coloured emerald/grassy green on their back, wings and flanks with a bright yellow chest, azure blue markings on their wings and brow, and a vivid orange patch on their belly.

During the summer, the distinguishing features between males and female OBPs are clear. The most obvious difference is in the blue of the frontal band across the forehead. Males have a very bright blue band that is two toned in colour, whilst the females have a duller blue band that is usually only one colour. A quick checklist of the distinguishing features of male and female OBPs is provided below.  

Male
  • Frontal band two-toned - dark blue edge above a pale blue band
  • Head, neck and upper-body are bright grass green
  • Bright yellow under-body with typically bright orange belly patch
  • Primary feathers (longest feathers near tail) are a rich dark blue on outer edge
  • Upper-tail is a vivid blue-green with bright yellow sides
Female
  • Frontal band usually only pale blue
  • Upper-body is duller
  • Under-body is a duller yellow
  • Belly patch is smaller and paler
  • Upper-tail is blue tinged with green

Juvenile OBPs (encountered in their breeding range from the end of January) are identified by their overall dull green plumage and bright orange/brown bill (as opposed to the black bill of the adults).

Scope Vision – Juvenile Orange-bellied Parrot on the feed-table at Melaleuca. (Photo: Marianne Gee)

Distinguishing among Neophema species is difficult because of their cryptic nature and similar plumage. The closely related Blue-winged Parrot and the OBP are superficially similar (see below). The Blue-winged Parrot can be distinguished from the OBP by having olive green rather than bright grassy green plumage, a yellow patch between the eye and bill, and an all blue shoulder patch.

Blue-winged Parrots have superficially similar plumage to Orange-bellied Parrots. Photo: Marina Campbell

Blue-winged Parrot (top left) shares a feeding table with Orange-bellied Parrots. Photo: Marina Campbell

The ‘alarm’ call is one of the surest methods of identification as the appearance of the plumage often varies according to the light. 

Given when the bird is disturbed or upset, the alarm call is a harsh, rapidly repeated 'zit-zit-zit', usually used whilst the bird is rising from a perch or the ground. In level flight, a single 'tseet' note is given each time it dips.

audio button Have a listen to their vocalisations here.


Migration

Every year OBPs undertake an extraordinary journey, migrating across the Bass Strait twice – in autumn they fly to coastal mainland southeast Australia to over-winter, and in spring they return to Melaleuca to breed over the summer.

Northern migration

By April each year, the OBP population departs the breeding grounds and migrates north along the west coast of Tasmania. 

It is most likely that passage from the southwest to Marrawah is tightly confined to the coast (less than two km). Sightings of OBPs north of Marrawah show that the species spreads across a broad area from Woolnorth to Stanley, where it feeds on saltmarshes and a range of pasture weeds and crops.

Observations suggest that the passage across Bass Strait is undertaken by island hopping through the western Bass Strait Islands (e.g. Robbins, Perkins, Montague, Hunter and King Islands). Individuals are known to feed for many days or even weeks at some sites. Sea Elephant River (King Island) is a critical habitat for the species with as many as 20 individuals feeding on saltmarsh during March–May.

Orange-bellied Parrots at one of their favourite vantage points at Melaleuca. Photo: Cole Rowe

Southern migration

The southern migration is far more rapid. Observations suggest that the species does not feed during passage, with a transit time from Victoria to Melaleuca of less than two days in some cases.

The flight corridor is not known but assumed to be the most direct route (i.e. across King Island direct to the west coast). Typically older birds are the first to arrive at the breeding grounds in late September or early October, while first year birds return through October to mid-November. Waves of arrivals coincide with north-westerly  winds on a 2–5 day pattern, suggesting that the species uses tail winds to assist passage.

Distribution and range

Southwest National Park

Southwest National Park. Photo DPIPWE

Historically, the breeding range of the Orange-bellied Parrot within Tasmania extended along the western and southern coast and east toward the Southport region. The current breeding range has contracted to the south-west of Tasmania, with recent breeding records restricted to within 20 km of Melaleuca, Bathurst Harbour.

The entire population moves to coastal habitats on the mainland during the non-breeding period (AprilSeptember). Historically, the OBP winter range on the mainland extended from Adelaide, and possibly Yorke Peninsula, south-east through the Coorong, Robe, Beachport and Port MacDonnell in South Australia, east through south-western coastal Victoria, Port Phillip Bay to South Gippsland, and north to near Sydney.

The range and abundance of the OBP has declined steadily since the 1920s and is now rarely recorded from west of the Murray River in South Australia or east of Port Phillp Bay, Victoria.

Melaleuca

Melaleuca Inlet - Mt Rugby. Photo: DPIPWE

Melaleuca is located within the Southwest National Park in the Tasmanian Wilderness World Heritage Area. The region is serviced by an airstrip which brings thousands of day-tripper tourists and bushwalkers undertaking the South Coast–Port Davey walking track during the summer months. From late September to early May, the buttongrass and sedgeland plains of Melaleuca provide feeding habitat for the OBP and the tall wet eucalypt forests (dominated by Eucalyptus nitida) provide critical OBP nesting habitat (Holdsworth 2006). Detailed descriptions of the vegetation communities of the region are described in Brown et al. 1993; Taylor et al. 1993; Parks and Wildlife Service 1999; Reid et al. 1999.

Melaleuca has a history of alluvial tin mining since 1940 (Mattingley 2001). In 2007, the mining ceased and the lease areas have now been subsumed into the Southwest Conservation Area. One residence continues to be occupied at Melaleuca under a separate lease and provides an important observation capacity to the OBP conservation program.

The area also has a long history (Aboriginal and European) of the use of fire to alter/manage habitats, to provide food, ease movement through the landscape, reduce vegetation to aid mining, reduce the risk of bushfires and protect built assets. Fire management activities are conducted by the Parks and Wildlife Service including habitat burns to promote suitable foraging areas for the OBP.

 

Habitat requirements

Orange-bellied Parrot feeding. Photo: Col Rowe

The OBP forages on a diversity of coastal or near coastal vegetation throughout its range. In Tasmania, the species utilises buttongrass plains and sedgelands, feeding on the mature flowers, fruits and seeds of a range of grasses, chenopods, sedges and herbs. Vegetation structure, plant species diversity and seeding response to fire influences the distribution and abundance of the food species, and availability of food within these habitats.

At Melaleuca, OBPs are also provided with supplementary bird seed at feed tables to enhance body condition and assist population monitoring throughout the breeding season. During the non-breeding period, OBPs are reliant on the seeds of a range of saltmarsh plants but also forage on other native and exotic plants adjacent to saltmarshes. Throughout its range, the OBP roosts within a range of dense coastal vegetation but particularly Acacia spp., Melaleuca spp. and Leptospermum spp.


 

Reproductive biology

Artificial nest boxes are provided for Orange-bellied Parrots at Melaleuca to assist with monitoring and to provide additional nest opportunities. Photo: DPIPWE

The OBP breeds only within Southwest Tasmania, with the known breeding population concentrated in the Melaleuca region. Birds typically arrive at Melaleuca during the first half of October. Nests are occupied from mid-November and nesting occurs in artificial nest boxes, or where available, hollows of eucalypt trees (typically Eucalyptus nitida).

Pairs tend to mate for life. The female stays in the nest for several days before the first egg is laid and clutches average 4.6 eggs (range 16). Only the female incubates the eggs during the 21-day incubation period. After hatching, the female remains on the nest for 10 days, being fed by the male.

After the 10 day brood period, the chicks are fed by both parents before fledging at four to five weeks of age. Fledglings are fed by both parents until the adults depart on the northern migration in FebruaryMarch. The fledglings typically depart between March and April. Juveniles are also individually colour banded from nest boxes each year which forms the basis of population studies.

Orange-bellied Parrots mating at their last known breeding ground at Melaleuca. Photo: Col Rowe

Orange-bellied parrots courting at their last known breeding ground at Melaleuca.  Photo: Cole Rowe

Orange-bellied Parrot courting pair at Melaleuca.  Photo: Col Rowe

Life history and demography

The OBP is an obligate migratory species. The entire population breeds only within Southwest Tasmania (OctoberMarch) and migrates to the mainland to spend the winter (AprilSeptember) in coastal areas of South Australia, Victoria and occasionally New South Wales. 

The life history and demography of the OBP is well known based on an 18-year capture-mark-recapture study at Melaleuca (Holdsworth et al 2011). Both sexes breed in their first year and can have a reproductive lifespan up to 10 years. However, the post-fledging, mean lifespan is only 2.2 years and maximum survival occurs in the second year of life, and declines thereafter. The oldest birds that have been recorded in the wild are 11.7 years (male) and 10.4 years (female; Holdsworth 2006).


 


References

Melaleuca

Brown, M.J., Brown, P.B., Bryant S.L., Horwitz, P., McQuillan, P.B., Nielson, E., Rounsevell, D.E., Smith, S.J. and Richardson, A.M.M. 1993. Buttongrass moorland ecosystems. Pp. 101–108 in Tasmanian Wilderness – World Heritage Values, eds. S.J. Smith and M.R. Banks. Royal Society of Tasmania, Hobart.

Holdsworth, M.C. 2006. Reproductive success and demography of the orange-bellied parrot Neophema chrysogaster. MSc thesis, University of Tasmania, Hobart.

.Mattingley, C. 2001. King of the wilderness: the life of Deny King. The Text Publishing Company, Melbourne.

Parks and Wildlife Service, 1999. Tasmanian Wilderness World Heritage Area Management Plan. Parks and Wildlife Service, Hobart.

Parks and Wildlife Service, 2002. Melaleuca–Port Davey Area Plan. Parks and Wildlife Service, Hobart.

Reid, J.B., Hill, R.S., Brown, M.J. and Hovenden, M.J. (eds.) 1999. Vegetation of Tasmania. Pp. in Flora of Australian Supplement Series 8, Australian Biological Resources Study. Environment Australia, Canberra.

Taylor, R.J., Balmer, J., Coy, R., Potts, B.M. and Wall, L.E. 1993. Flora and fauna of the sclerophyll ecosystems. Pp. 91–100 in Tasmanian Wilderness – World Heritage Values, eds. S.J. Smith and M.R. Banks. Royal Society of Tasmania, Hobart.

Life history and demography

Holdsworth, M.C. 2006. Reproductive success and demography of the orange-bellied parrot Neophema chrysogaster. MSc thesis, University of Tasmania, Hobart.

Holdsworth, M., Dettmann, B., and Baker, G.B. 2011. Survival in the orange-bellied parrot (Neophema chrysogaster). Emu 111, 222–228.


 



 

Contact

Orange-bellied Parrot Tasmanian Program
Natural Values Conservation Branch
GPO Box 44
Hobart TAS 7001

Email: OBP.Program@dpipwe.tas.gov.au

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