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| Dromaius novaehollandiae | |
|---|---|
| Name | Common emu |
| Status | LC |
| Status system | IUCN3.1 |
| Genus | Dromaius |
| Species | novaehollandiae |
| Authority | (Latham, 1790) |
Dromaius novaehollandiae is the emu, the large flightless bird native to Australia and the second-largest extant bird after the ostrich. It is a prominent faunal emblem widely recognized in Canberra, Australian coat of arms, and Australian Commonwealth symbolism, and features in the histories of Aboriginal Australians, European exploration by Matthew Flinders, and colonial records from the era of the British Empire. Emus play roles in modern Australian federalism debates over land use, agriculture, and conservation policy.
The species was described by John Latham in 1790 and assigned to genus Dromaius; historical taxonomic treatments involved comparisons with the moa fossils of New Zealand and the African ostrich by 19th-century naturalists such as Charles Darwin and Alfred Russel Wallace. Subspecies and regional forms were proposed by authorities including George Shaw and John Gould during colonial ornithological surveys; contemporary consensus, reflected in lists maintained by institutions like the International Ornithologists' Union and the Royal Australasian Ornithologists Union, recognizes several geographic populations unified under a single species. Nomenclatural discussions intersect with indigenous names recorded by explorers and ethnographers, and with legislative acts governing wildlife listed under Environment Protection and Biodiversity Conservation Act 1999 frameworks.
Adults are large, erect birds with shaggy, brownish plumage and long necks and legs; key morphological features informed descriptions in treatises by Gould and measurements used in comparative anatomy studies at museums such as the Natural History Museum, London and the Australian Museum. Sexual dimorphism is subtle and was addressed in field guides produced by CSIRO Publishing and monographs authored by ornithologists from the Royal Society of New South Wales. The emu's integument and flightless morphology were analyzed in the context of locomotion research at universities including University of Sydney and University of Melbourne, and its vocal anatomy has been compared with flighted ratites in papers published in journals associated with the Australian Academy of Science.
The species historically occupied a range spanning most of mainland Australia, documented in expedition journals of Edward John Eyre, Ludwig Leichhardt, and Stuart; present distribution is shaped by habitat modification connected to agricultural expansion overseen by administrations in New South Wales, Victoria, Queensland, Western Australia, and South Australia. Emus use ecosystems such as savanna woodlands, grasslands, and semi-arid scrub described in regional ecological surveys conducted by agencies like the Department of Environment and Energy (Australia). Their range contraction and expansion have been monitored via programs run by state parks and conservation units including Parks Victoria and the New South Wales National Parks and Wildlife Service.
Emus are nomadic and opportunistic foragers studied in ecological research by teams at CSIRO and universities; they feed on a variety of plant and animal matter recorded by botanists from the Australian National Herbarium and entomologists at the Commonwealth Scientific and Industrial Research Organisation. Seasonal movements have been linked to rainfall patterns analyzed by climatologists at the Bureau of Meteorology (Australia), and their interactions with grazing livestock were investigated in agricultural reports from the Department of Agriculture and Water Resources. Predation dynamics historically involved marsupial predators documented in faunal records curated by institutions such as the Australian Museum and interactions with introduced species like the red fox and feral cat have been the subject of management plans by state governments.
Breeding biology includes male incubation and chick rearing, a role emphasized in ethological studies by researchers affiliated with Monash University and the University of Western Australia. Courtship displays, nest construction, and clutch parameters were described in field studies published through societies such as the Birds Australia network. Juvenile development stages, growth rates, and survivorship have been monitored in long-term studies co-sponsored by conservation groups like the World Wide Fund for Nature and regional wildlife trusts operating in Kangaroo Island and mainland reserves.
The species is listed as Least Concern on international assessments coordinated by the International Union for Conservation of Nature, but regional threats include habitat loss from agricultural intensification promoted by planning authorities in Canberra and transportation mortality on road networks managed by state transport departments. Historical extirpation of insular forms linked to sealing and hunting during the era of the British colonisation of Australia occurred on islands recorded in expedition logs; contemporary threats involve collisions with vehicles, inadvertent entanglement in fencing overseen by pastoral agencies, and competition with stock examined in reports by the Australian Bureau of Agricultural and Resource Economics. Conservation responses have involved translocations and management guidelines developed by state agencies and non-governmental organizations such as Greening Australia.
Emus have cultural importance to many Aboriginal Australians communities, featuring in creation stories recorded by ethnographers and incorporated into contemporary cultural heritage statements lodged with institutions like the Australian Institute of Aboriginal and Torres Strait Islander Studies. They have economic roles in commercial farming enterprises regulated under state agricultural codes and featured in tourism marketing by regional authorities including state tourism commissions. Emu representations appear on the Australian coat of arms and in national iconography used by bodies such as the Australian Defence Force; they have also been subjects of controversy in policy debates over crop damage compensation administered by local councils and parliamentary inquiries in the Parliament of Australia.