Wildlife Research Wildlife Research Society
Ecology, management and conservation in natural and modified habitats

Ecological and human dimensions of management of feral horses in Australia: a review

Dale Graeme Nimmo A B and Kelly K. Miller A

A School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Vic. 3125, Australia.

B Corresponding author. Landscape Ecology Research Group, Deakin University, 221 Burwood Highway, Burwood, Vic. 3125, Australia. Email: dgni@deakin.edu.au

Wildlife Research 34(5) 408-417 http://dx.doi.org/10.1071/WR06102
Submitted: 9 August 2006  Accepted: 12 July 2007   Published: 6 September 2007


In Australia, the management of feral horse populations is a contentious issue, owing to their pluralistic status as an introduced pest and a national icon. In this review, we synthesise current knowledge of the ecological effects of feral horses and the human dimensions of feral horse management, using case studies from around the world to illustrate contentious and successful management practices. We highlight gaps in the literature and suggest that more peer-reviewed research would be beneficial in reducing the current public controversy surrounding management of feral horses.


Aitken V., Kroef P., Pearson A., and Ricketts W. (1979). Observations of feral horses in the southern Kaimanawa mountains. Report to the Wild Horse Committee, Palmerston North, New Zealand.

Andreoni F. (1998). Evaluating environmental consequences of feral horses in Guy Fawkes River National Park: a report to National Parks and Wildlife Service. NR 490 Project. University of New England, Armidale, NSW.

Ashton A. (2005). Bark chewing by the wild horses of Guy Fawkes River National Park, NSW: impacts and causes. B.Sc.(Honours) Thesis, University of New England, Armidale, NSW.

Aslin H. J. (1996). Speaking of the wild: Australian attitudes to wildlife. Ph.D. Thesis, The Australian National University, Canberra.

Aslin H. J. Bennett D. H. 2000 Wildlife and world views: Australian attitudes to wildlife. Human Dimensions of Wildlife 15 15 35

Appleton, R. (Ed.) (1983). ‘Australian Encyclopaedia.’ (The Grolier Society of Australia Pty Ltd: Sydney.)

Bailey D. W. Gross J. E. Laca E. A. Rittenhouse L. R. Coughenour M. B. Swift D. M. Sims P. L. 1996 Mechanisms that result in large herbivore grazing distribution patterns. Journal of Range Management 49 386 400

Ballard G. (2005). Understanding people to improve wildlife management: case studies in human dimensions research from NSW, Australia. Ph.D. Thesis, University of New England, Armidale, NSW.

Bates G. H. 1935 The vegetation of footpaths, sidewalks, cart-tracks, and gateways. Journal of Ecology 23 470 487

Baxter G. S. Hockings M. Carter R. W. Beeton J. S. 1999 Trends in wildlife management and the appropriateness of Australian university teaching. Conservation Biology 13 842 849 DOI

Beever E. A. (1999). Species and community-level responses to disturbance imposed by feral horse grazing and other management practices. Ph.D. Thesis, University of Nevada, Reno, NV.

Beever E. A. 2003 Management implications of the ecology of free-roaming horses in semi-arid ecosystems of the western United States Wildlife Society Bulletin 31 887 895

Beever E. A., and Brussard P. F. (2000a). Charismatic megafauna or exotic pest? Interactions between popular perceptions of feral horses (Equus caballus) and their management and research. In ‘Proceedings of the 19th Vertebrate Pest Conference’.

Beever E. A. Brussard P. F. 2000 b Examining ecological consequences of feral horse grazing using exclosures. Western North American Naturalist 60 236 254

Beever E. A. Brussard P. F. 2004 Community- and landscape-level responses of reptiles and small mammals to feral-horse grazing in the Great Basin Journal of Arid Environments 59 271 297

Beever E. A. Herrick J. E. 2006 Effects of feral horses in Great Basin landscapes on soils and ants: direct and indirect mechanisms. Journal of Arid Environments 66 96 112 DOI

Beever E. A. Tausch R. J. Brussard P. F. 2003 Characterizing disturbance in semiarid ecosystems across broad spatial scales using multiple indices Ecological Applications 13 119 136 DOI

Berger J. 1983 Ecology and catastrophic mortality in wild horses: implications and interpreting fossil assemblages. Science 220 1403 1404 DOI

Berman M. D., and Jarman P. J. (1988). Feral horses in the Northern Territory. Vol. 4: Environmental impact of feral horses in central Australia. Conservation Commission of the Northern Territory, Darwin.

Bestelmeyer B. T. Wiens J. A. 2001 Ant biodiversity in semiarid landscape mosaics: the consequences of grazing vs. natural heterogeneity. Ecological Applications 11 1123 1140

Blake M. T. Wilson., and Public Lands Resource Council vs. Babbit. (1992). Civil action case No 93–276RCL, U. S. District court for the district of Columbia, Washington, D.C.

Bowman A. J. (1985). Analysis of aerial survey data from Alice Springs district and implication for feral horse management. B.Nat.Res. Project, University of New England, Armidale, NSW.

Boyles J. S. 1986 Managing America’s wild horses and burros. Journal of Equine Vetenary Science 6 261 265

Burke G. (1996). More than pests: the strategic significance of feral animals and invasive plants for nature conservation and landcare in Western Australia. Murdoch University, Perth.

Cameron E. Z., Linklater W. L., Stafford K. J., and Minot E. O. (2001). Population dynamics 1994–98, and management of Kaimanawa wild horses. Science for Conservation 171. New Zealand Department of Conservation.

Campbell J. E. Gibson D. J. 2001 The effect of seeds of exotic species transported via horse dung on vegetation along trail corridors Plant Ecology 157 23 35

Chapple R. 2005 The politics of feral horse management in Guy Fawkes River National Park, NSW. Australian Zoologist 33 233 246

Clemann N. 2002 A herpetofauna survey of the Victorian alpine region, with a review of threats to these species. Victorian Naturalist 119 48 58

Cole D. N. 1978 Estimating the susceptibility of wild-land vegetation to trailside alteration. Journal of Applied Ecology 15 281 286

Coventry A. J. Robertson P. 1980 New records of scincoid lizards from Victoria. Victorian Naturalist 97 190 193

Crossley G. (2006). Horse culture in Australia and the management of wild horses. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Dale D. Weaver T. 1974 Trampling effects on vegetation of the trail corridors of north Rocky Mountain forests. Journal of Applied Ecology 11 767 772

Dawson M. J. (2005). The population ecology of feral horses in the Australian Alps: management summary. Unpublished report. Australian Alps Liaison Committee, Canberra.

Dawson M. J., Lane C., and Saunders G. (2006). Proceedings of the National Feral Horse Management Workshop. (Invasive Animals Cooperative Research Centre: Canberra.)

Dear M. 1994 Who’s afraid of postmodernism? Reflections on Symanski and Cosgrove. Annals of the Association of American Geographers 84 295 300 DOI

Decker D. J., Brown T. L., and Siemer W. F. (2001). ‘Human Dimensions of Wildlife Management in North America.’ (The Wildlife Society: Bethesda, MD.)

Department of Conservation and Environment (1991). Track monitoring project – alpine walking track – King Billy/Mount Howitt section – alpine national park. Unpublished Report. Department of Conservation and Environment, Heidelberg, Victoria.

Dobbie W. R., Berman McK. D., and Braysher M. L. (1993). ‘Managing Vertebrate Pests: Feral Horse.’ (Australian Government Publishing Service: Canberra.)

Dyring J. (1990). The impact of feral horses (Equus caballus) on sub-alpine and montane environments. University of Canberra, Canberra.

Dyring J. (1991). Management implications of the 1988–1990 study: the impact of feral horses on sub-alpine and montane environments in Australia. University of Canberra, Canberra.

Edwards G., Saalfeld K., and Bowland T. (2006). Feral horses in the Northern Territory. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Enck J. W. Decker D. J. 1997 Examining assumptions in wildlife management: a contribution of human dimensions inquiry. Human Dimensions of Wildlife 2 56 72

English A. W. (2000). Report on the cull of feral horses in Guy Fawkes River National Park in October 2000. Independent Review commissioned by the NSW National Parks and Wildlife Service. NSW NPWS, Sydney.

English A. W. (2001). report on the management of feral horses in national parks in New South Wales. Unpublished report. NSW NPWS, Sydney.

Finch N. A. Baxter G. S. 2007 Oh deer, what can the matter be? Landholder attitudes to deer management in Queensland. Wildlife Research 34 211 217

Fleury B. (2006). Kaimanawa wild horses: management versus passion. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Foster D. (2004). Brumby running – Victoria. Feral horse management: report of a workshop. Australian Alps Liaison Committee, Thredbo, NSW.

Fraser W. (2001). Introduced wildlife in New Zealand: a survey of general public views. Landcare Research science series 23. Manaaki Whenua Press, Lincoln, New Zealand.

Fulton D. C. Manfredo M. J. Lipscomb J. 1996 Wildlife value orientations: a conceptual and measurement approach. Human Dimensions of Wildlife 1 24 47

Gillespie G. R., Osborne W. S., and McElhinney N. A. (1995). The conservation status of frogs in the Australian Alps, a review. A report to the Alps liaison committee. Victorian Department of Conservation and Natural Resources, Melbourne.

Hamazaki T. Tanno D. 2002 Totemisation of wildlife and NIMBY among U.S. college students. Human Dimensions of Wildlife 7 107 121

Hinds L. A. (2006). Fertility control of large herbivores: a brief overview of the options. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Hobbs N. T. 1996 Modification of ecosystems by ungulates. Journal of Wildlife Management 60 695 713 DOI

Hobbs R. J. 2001 Synergisms among habitat fragmentation, livestock grazing, and biotic invasions in southwestern Australia. Conservation Biology 15 1522 1528 DOI

International Court of Justice for Animal Rights. (1987). Verdict of the international Court of Justice for Animal Rights in the Case of the Massacre of Horses in Australia. (International Court of Justice for Animal Rights: Zurich.)

Janzen D. H. 1981 Enterolobium cyclocarpun seed passage rate and survival in horses, Costa Rican pleistocene seed dispersal agents. Ecology 62 593 601 DOI

Jennings S. (2006). Feral horse management in South Australia. In ‘Proceedings of the National Feral-horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Johnston M. J., and Marks C. A. (1997). Attitudinal survey of vertebrate pest management in Victoria. Report series no. 3. Victorian Department of Natural Resources and Environment, Melbourne.

Jones B., and Coleman S. (2006). Animal welfare: RSPCA perspective. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Jones D. N., Enck J. W., Siemer W. F., Brown T. L., and Decker D. J. (1998). An introduction to human dimensions of wildlife management: taking the North American experience to Australia. Cornell University Human Dimensions Research Unit Series 98–7. Cornell University, Ithaca, New York.

Kellert S. R. 1993 Attitudes, knowledge, and behaviour toward wildlife among the industrial superpowers: United States, Japan, and Germany. Journal of Social Issues 49 53 69

Kellert S. R., and Berry J. K. (1980). ‘Knowledge, affection and basic attitudes toward animal in American society. Phase III results of US Fish and Wildlife study.’ (U.S government Printing Office: Washington, DC.)

Kellert S. R. Berry J. K. 1987 Attitudes, knowledge, and behaviors toward wildlife as affected by gender. Wildlife Society Bulletin 15 363 371

Kelly L. T. 2006 Distribution and habitat requirements of the yellow-footed Antechinus flavipes at multiple scales: a review. Victorian Naturalist 123 91 100

Killian G. L. A. Miller N. K. Diehl J. Rhyan J. Thain D. 2004 Evaluation of three contraceptive approaches for population control of wild horses. Proceedings of the 21st Vertebrate Pest Conference 21 263 268

Kirkpatrick J. F. Turner J. W. Liu I. K. M. Jr Fayrer-Hosken R. Rutberg A. T. 1997 Case studies in wildlife immunocontraception: wild and feral equids and white-tailed deer. Reproduction, Fertility and Development 9 105 110

Lauber T. B. Anthony M. L. Knuth B. A. 2001 Gender and ethical judgments about suburban deer management. Society & Natural Resources 14 571 583 DOI

Letts G. A. 1962 Early livestock introductions to the ‘Top End’ of the Northern Territory. Australian Veterinary Journal 38 282 287

Levin P. S. Ellis J. Petrik R. Hay M. E. 2002 Indirect effects of feral horses on estuarine communities. Conservation Biology 16 1364 1371

Linklater W. L. Cameron E. Z. Stafford K. J. Veltman C. J. 2000 Social and spatial structure and range use by Kaimanawa wild horses (Equus caballus: Equidae). New Zealand Journal of Ecology 24 139 152

Linklater W. L. Stafford K. J. Minot E. O. Cameron E. Z. 2002 Researching feral horse ecology and behaviour: turning political debate into opportunity. Wildlife Society Bulletin 30 644 650

Linklater W. L. Cameron E. Z. Minot E. O. Stafford K. J. 2004 Feral horse demography and population growth in the Kaimanawa Ranges, New Zealand. Wildlife Research 31 119 128

Long J. L. (2003). ‘Introduced Mammals of the World.’ (CSIRO Publishing: Melbourne.)

Low G. A., and Hewett M. R. (1990). Aerial survey of horses and other large animals in the central ranges of the Alice Springs district, October 1988. Consultanancy report to the Conservation Commission of the Northern Territory.

Low T. (1999). ‘Feral Future: the Untold Story of Australia’s Exotic Invaders.’ (Viking, Penguin: Melbourne.)

Lynn W. S. 1998 Contested moralities: animals and moral value in the Dear/Symanski debate. Ethics Place and Environment 1 223 242

Mack R. N. Thompson J. N. 1982 Evolution in steppe with few large, hoofed mammals. American Naturalist 119 757 773

Mack R. N. Simberloff D. Lonsdale W. M. Evans H. Clout M. Bazza F. A. 2000 Biotic invasions: causes, epidemiology, global consequences, and control. Ecological Applications 10 689 710

Mackey B. Lindenmayer D. 2001 Towards a hierarchical framework for modelling the spatial distribution of animals. Journal of Biogeography 28 1147 1166

Manfredo M. J. Teel T. L. Bright A. D. 2003 Why are public values toward wildlife changing? Human Dimensions of Wildlife 8 285 304

Mansergh I. 1982 Notes on the range extension of the alpine water skink (Sphenomorphus kosciuskoi) in Victoria. Victorian Naturalist 99 123 124

Matthews D., Bryan R., and Edwards G. (2001). Recovery of the black-footed rock-wallaby following horse removal on Finke Gorge National Park, Northern Territory. In ‘Proceedings of the 12th Australasian Vertebrate Pest Conference’. p. 204.

McKnight T. (1976). ‘Friendly vermin. A Survey of Feral Livestock in Australia.’ University of California Publications in Geography, Vol. 21. (University of California Press: Berkeley, CA.)

McLeod T. (2004). Counting the cost: impact of invasive animals in Australia 2004. Cooperative Research Centre for Pest Animal Control, Canberra.

Miller C. (2005). First the cattle, now for the brumbies. The Age 19 June 2005.

Miller K. K. (2000). Public and stakeholder values and knowledge of wildlife in Victoria, Australia. Ph.D. Thesis, Deakin University, Melbourne.

Miller K. K. 2003 Public and stakeholder values of wildlife in Victoria Australian Wildlife Research 30 465 476

Miller K. K. Brown P. R. Temby I. 1999 Attitudes towards possums: a need for education? Victorian Naturalist 116 120 126

Miller K. K. Jones D. N. 2005 Wildlife management in Australasia: perceptions of objectives and priorities. Wildlife Research 32 265 272

Miller K. K. Jones D. N. 2006 Gender differences in the perceptions of wildlife management objectives and priorities in Australasia. Wildlife Research 33 155 159 DOI

Miller K. K. McGee T. K. 2000 Sex differences in values and knowledge of wildlife in Victoria, Australia. Human Dimensions of Wildlife 5 54 68

Nano T. J. Smith C. M. Jefferys E. 2003 Investigation into the diet of the central rock-rat (Zyzomys pedunculatus). Wildlife Research 30 513 518

Nesbitt B. (2006). Feral horse management on conservation reserves in New South Wales. In ‘Proceedings of the National Feral Horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

New South Wales Legislative Assembly Hansard (2002). Article 34 – National Parks Wild Horse Control. Parliament of New South Wales, Australia.

New South Wales National Parks and Wildlife Service (2003). Guy Fawkes River National Park draft horse management plan, November 2003. NSW National Parks and Wildlife Service, Northern Directorate.

New South Wales National Parks and Wildlife Service (2006). Guy Fawkes River National Park: Horse Management Plan. Department of Environment and Conservation NSW, Sydney.

New Zealand Department of Conservation (1995). Kaimanawa Wild Horses Plan. Department of Conservation, Wanganui Conservancy, New Zealand.

Nimmo D. G. (2005). Managing wild horses in Victoria, Australia – a study of community attitudes and perceptions. B.Sc.(Honours) Thesis, Deakin University, Melbourne.

Nugent R. (1988). Aboriginal attitudes to feral animals and land degradation. Central Land Council, Alice Springs, NT.

Momatiuk Y. Eastcott J. 1997 Mustangs on the move: without free-roaming bands of wild horses, the American west just wouldn’t be the same. Smithsonian Magazine 28 5 15

Olff H. Ritchie M. E. 1998 Effects of herbivores on grassland plant diversity. Trends in Ecology & Evolution 13 261 265

Penzhorn B. L. 1984 Observations on mortality of free-ranging Cape mountain zebras Equus zebra. South African Journal of Wildlife Research 14 89 90

Reading R. P. Kellert S. R. 1993 Attitudes towards a proposed reintroduction of black-footed ferrets. Conservation Biology 7 569 580

Reading P. R. Clark T. W. Arnold A. 1994 Attitudes towards the endangered eastern barred bandicoot. Anthrozoos 7 255 269

Rikoon J. S. 2006 Wild horses and the political ecology of nature restoration in the Missouri Ozarks. Geoforum 37 200 211

Rogers G. M. 1991 Kaimanawa feral horses and their environmental impacts. New Zealand Journal of Ecology 15 49 64

Rogers G. M. 1994 a North Island seral tussock grasslands. 1. Origins and land-use history. New Zealand Journal of Botany 32 271 286

Rogers G. M. (1994b). Kaimanawa feral horses: recent environmental impacts in their northern range. Unpublished Report. Department of Conservation, New Zealand.

Rolls E. (1969). ‘They All Ran Wild.’ (Angus and Robertson: Sydney.)

Rutberg A. (2003). Wild horses and burros in the United States. In ‘The State of Animals. II’. (Eds D. J. Salem and A. N. Rowan.) pp. 217–221. (Humane Society Press: Washington, DC.)

Schott C. (2002). Ecology of free-ranging horse in northern Guy Fawkes River National Park – Research Progress Report. University of New England, Armidale, NSW.

Scorolli A. L. Lopez Cazorla A. C. Telera L. A. 2006 Unusual mass mortality of feral horses during a violent rainstorm in Parque Provincial Tornquist, Argentina. Mastozoologia Neotropical 13 255 258

Sidney S. (1854). ‘Gallops and Gossips in the Bush of Australia.’ (Longman, Brown, Green and Longmans: London.)

Singer P. 1997 Neither human nor natural: ethics and feral animals. Reproduction, Fertility and Development 9 157 162

Stout R. J. Knuth B. A. Curtis P. D. 1997 Preferences of suburban landowners for deer management: a step towards better communication. Wildlife Society Bulletin 25 348 359

Symanski R. 1994 Contested realities: feral horses in outback Australia. Annals of the Association of American Geographers. Association of American Geographers 84 251 269

Symanski R. 1996 Dances with horses: lessons from the environmental fringe. Conservation Biology 10 708 712 DOI

Taylor U. (1995). Seed dispersal from feral horse manure at Guy Fawkes River National Park. NR 490 Project. University of New England, Armidale, NSW.

Thomas L. Jones D. N. 1997 Control versus chaos: a unique suburban wildlife conflict in Australia. Human Dimensions of Wildlife 2 50 51

Turner J. W. Liu I. K. M. Flanagan D. R. Rutberg A. T. Kirkpatrick J. F. 2001 Immunocontraception in feral horses: one inoculation provides one year of infertility. Journal of Wildlife Management 65 235 241

Turner M. G. 1987 Effects of grazing by feral horses, clipping, trampling and burning on a Georgia salt marsh. Estuaries 10 54 60 DOI

Tyser R. W. Worley C. A. 1992 Alien flora in grasslands adjacent to road and trail corridors in Glacier National Park, Montana (U.S.A.). Conservation Biology 6 253 261 DOI

Vander Noot G. W. Symons L. D. Lydman R. K. Fonnesbeck P. V. 1967 Rate of passage of various feedstuffs through the digestive tract of horses. Journal of Animal Science 26 1309 1311

Veltman C. J. 2001 Advances in New Zealand mammalogy 1990–2000: feral horse. Journal of the Royal Society of New Zealand 31 219 244

Wagner F. H. 1983 Status of wild horses and burro management on public rangelands. Transactions of the North American Wildlife and Natural Resources Conference 48 116 133

Walker B. H. Emslie R. N. Owen-Smith N. Scholes R. J. 1987 To cull or not to cull: lessons from a southern African drought. Journal of Applied Ecology 24 381 401

Walter M. (2002). Population ecology of wild horses in the Australian Alps. Ph.D. Thesis, University of Canberra.

Watkins R. (2006). A Western Australian Perspective. In ‘Proceedings of the National Feral-horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Watson J. 1996 Charisma. International Wildlife 26 20 39

Weaver V., and Adams R. (1996). Horses as vectors in dispersal of weeds into bushland. In ‘Proceedings of the 11th Australian Weeds Conference’.

Whinam J. Comfort M. 1996 The impact of commercial horse riding on sub-alpine environments at Cradle Mountain, Tasmania. Journal of Environmental Management 47 61 70

Whinam J. Cannell E. J. Kirkpatrick J. B. Comfort M. 1994 Studies on the potential impact of recreational horse riding on some alpine environments of the central plateau, Tasmania. Journal of Environmental Management 40 103 117 DOI

Wiens J. A. 1989 Spatial scaling in ecology. Functional Ecology 3 385 397 DOI

Wilke A., and Paroz P. (1988). Feral horse management in Queensland. In ‘Proceedings of the National Feral-horse Management Workshop’. (Invasive Animals Cooperative Research Centre: Canberra.)

Williams T. 2006 Horse sense: to Americans, the image of mustangs pounding across the range is a potent symbol of the Wild West. But it’s a myth that harms wildlife and wreaks environmental havoc. Audubon 108 10 12

Zalba S. M. Cozzani N. C. 2004 The impact of feral horses on grassland bird communities in Argentina. Animal Conservation 7 35 44

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