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Article << Previous     |     Next >>   Contents Vol 113(1)

A hot environment and one type of prey: investigating why the Grey Falcon (Falco hypoleucos) is Australia’s rarest falcon

Jonny Schoenjahn

1 Elimatta Way, City Beach, WA 6015, Australia. Email: jonnybird@bigpond.com

Emu 113(1) 19-25 http://dx.doi.org/10.1071/MU12049
Submitted: 12 June 2012  Accepted: 12 September 2012   Published: 8 November 2012

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The Grey Falcon (Falco hypoleucos) is a poorly known endemic of inland Australia. It is considered Australia’s rarest falcon and among the rarest Falco species of the world. Current information on the species is largely restricted to opportunistic observations and specimens in wildlife collections. Here I detail information on the breeding and dietary ecology of the species from a continent-wide field study from 2003 to 2011. Breeding was recorded 37 times. The breeding distribution of the species was more appropriately described by climatic categories than by average annual rainfall. All nest-sites occurred in areas of the hottest climate classes. All but two food items identified were birds; the two exceptions were rodents captured during a rodent outbreak in September 2011. This study provides the first coherent set of firsthand data concerning key aspects of the ecology of the Grey Falcon, constituting a valuable resource for future studies of the species. The results presented suggest that the restriction of the breeding distribution of the species to areas of the highest annual average temperatures and its almost exclusively avian diet are likely factors associated with the species’ rarity.

Additional keywords: diet, endemic, Koeppen classification, pellet, raptor ecology.


Aumann, T. (2001a). Habitat use, temporal activity patterns and foraging behaviour of raptors in the south-west of the Northern Territory, Australia. Wildlife Research 28, 365–378.
CrossRef |

Aumann, T. (2001b). An intraspecific and interspecific comparison of raptor diets in the south-west of the Northern Territory, Australia. Wildlife Research 28, 379–393.
CrossRef |

Aumann, T. (2001c). The structure of raptor assemblages in riparian environments in the south-west of the Northern Territory, Australia. Emu 101, 293–304.
CrossRef |

Aumann, T. (2001d). Breeding biology of raptors in the south-west of the Northern Territory, Australia. Emu 101, 305–315.
CrossRef |

Barrett, G., Silcocks, A., Barry, S., Cunningham, R., and Poulter, R. (2003). ‘The New Atlas of Australian Birds.’ (Royal Australasian Ornithologists Union: Melbourne.)

Beruldsen, G. (2003). ‘Australian Birds, Their Nests and Eggs.’ (The author: Kenmore Hills, Qld.)

BirdLife International (2012). BirdLife species fact-sheet: Grey Falcon Falco hypoleucos. (BirdLife International: Cambridge, UK.) Available at http://www.birdlife.org/datazone/speciesfactsheet.php?id=3615 [Verified 8 June 2012].

Blakers, M., Davies, S. J. J. F., and Reilly, P. N. (1984). ‘The Atlas of Australian Birds.’ (Melbourne University Press: Melbourne.)

Brooks, A. (1929). On pellets of hawks and owls. Condor 31, 222–223.

Brouwer, J., and Garnett, S. (Eds) (1990). ‘Threatened Birds of Australia, An Annotated List.’ RAOU Report Number 68. (Royal Australasian Ornithologists’ Union: Melbourne.)

Cade, T. J. (1982). ‘The Falcons of the World.’ (Collins: London.)

Campbell, A. J. (1900). ‘Nests and Eggs of Australian Birds.’ (The author: Melbourne.)

Christidis, L., and Boles, W. E. (2008). ‘Systematics and Taxonomy of Australian Birds.’ (CSIRO Publishing: Melbourne.)

Cupper, J., and Cupper, L. (1980). Nesting of the Grey Falcon Falco hypoleucos. Australian Bird Watcher 8, 212–219.

Debus, S. J. S., and Rose, A. B. (2000). Diet of Grey Falcons Falco hypoleucos breeding extralimitally in New South Wales. Australian Bird Watcher 18, 280–281.

Falkenberg, I. D. (2011). Aspects of the ecology of the Grey Falcon Falco hypoleucos in the South Australian arid zone. Corella 35, 23–28.

Frankham, R., Ballou, J. D., and Briscoe, D. A. (2002). ‘Introduction to Conservation Genetics.’ (Cambridge University Press: Cambridge, UK.)

Garnett, S. T., and Crowley, G. M. (2000). ‘The Action Plan for Australian Birds 2000.’ (Environment Australia: Canberra.)

Garnett, S. T., Szabo, J. K., and Dutson, G. (2011). ‘The Action Plan for Australian Birds 2010.’ (CSIRO Publishing: Melbourne.)

Glading, B., Tillotson, D. F., and Selleck, D. M. (1943). Raptor pellets as indicators of food habits. California Fish and Game 29, 92–121.

Gould, J. (1841). ‘The Birds of Australia. Part 5.’ (The author: London.)

Gould, J. (1848). ‘The Birds of Australia. Vol. 1.’ (The author: London.)

Harrison, R. (2000). Observations on the Grey Falcon Falco hypoleucos. Australian Bird Watcher 18, 267–269.

Hollands, D. (1984). ‘Eagles, Hawks and Falcons of Australia.’ (Nelson: Melbourne.)

IUCN (2011). ‘IUCN Red List of Threatened Species. Version 2011.2.’ (International Union for Conservation of Nature: Gland, Switzerland.) Available at http://www.iucnredlist.org [Verified 8 June 2012].

Johnstone, R. E., and Storr, A. H. (1998). ‘Handbook of Western Australian Birds. Vol. 1: Non-Passerines (Emu to Dollarbird).’ (Western Australian Museum: Perth.)

Marchant, S., and Higgins, P. J. (Eds) (1993). ‘Handbook of Australian, New Zealand and Antarctic Birds. Vol. 2: Raptors to Lapwings.’ (Oxford University Press: Melbourne.)

McGilp, J. N. (1923). Birds of Lake Frome district, South Australia. Part 2. Emu 22, 274–287.
CrossRef |

Møller, A. P. (2011). Climate change and birds. In ‘Handbook of the Birds of the World. Vol. 16: Tanagers to New World Blackbirds’. (Eds J. del Hoyo, A. Elliot and D. A. Christie.) pp. 13–39. (Lynx Edicions: Barcelona.)

Morris, F. T. (1976). ‘Birds of Prey of Australia: A Field Guide.’ (Lansdowne: Melbourne.)

North, A. J. (1912). ‘Nests and Eggs of Birds Found Breeding in Australia and Tasmania. Vol. 3.’ Australian Museum Special Catalogue Number 1. (Australian Museum: Sydney.)

Olsen, P. (1998). Australia’s raptors: diurnal birds of prey and owls. Birds Australia Conservation Statement Number 2. Birds Australia, Melbourne.

Olsen, P., and Marples, T. G. (1993). Geographic variation in egg size, clutch size and date of laying of Australian raptors (Falconiformes and Strigiformes). Emu 93, 167–179.
CrossRef |

Olsen, P. D., and Olsen, J. (1986). Distribution, status, movements and breeding of the Grey Falcon Falco hypoleucos. Emu 86, 47–51.
CrossRef |

Olsen, P., Fuller, P., and Marples, T. G. (1993). Pesticide-related eggshell thinning in Australian raptors. Emu 93, 1–11.
CrossRef |

Schoenjahn, J. (2010a). Field identification of the Grey Falcon Falco hypoleucos. Australian Field Ornithology 27, 49–58.

Schoenjahn, J. (2010b). The type and other early specimens of Grey Falcon Falco hypoleucos. Bulletin of the British Ornithologists’ Club 130, 102–115.

Schoenjahn, J. (2011a). How scarce is the Grey Falcon? Boobook 29, 24–25.

Schoenjahn, J. (2011b). Morphometric data of recent specimens and live individuals of the Grey Falcon Falco hypoleucos. Corella 35, 16–22.

Schrader, N. (2005). Grey Falcons in central-western NSW. Boobook 23, 44.

Steele, W. K., and Baker-Gabb, D. J. (2000). Understanding the distribution of Australia’s diurnal raptors. In ‘Raptors at Risk’. (Eds R. D. Chancellor and B.-U. Meyburg.) pp. 475–485. (Hancock House: Surrey, BC, Canada; and World Working Group on Birds of Prey: Berlin.)

Stern, H., de Hoedt, G., and Ernst, J. (2000). Objective classification of Australian climates. Australian Meteorological Magazine 49, 87–96.

Sturt, C. (1849). ‘Narrative of an Expedition into Central Australia. Vol. 2.’ (T. & W. Boone: London.)

Sutton, A. J. G. (2011a). Aspects of the biology of the Grey Falcon Falco hypoleucos in the Pilbara region of Western Australia. Corella 35, 11–15.

Sutton, A. J. G. (2011b). Observations on the raptor community of the Pilbara region of Western Australia. Australian Field Ornithology 28, 129–132.

Traill, L. W., Brook, B. W., Frankham, R. R., and Bradshaw, C. J. A. (2010). Pragmatic population viability targets in a rapidly changing world. Biological Conservation 143, 28–34.
CrossRef |

White, C. M., Olsen, P. D., and Kiff, L. F. (1994). Family FALCONIDAE (Falcons and Caracaras). In ’Handbook of the Birds of the World. Vol. 2: New World Vultures to Guineafowl’. (Eds J. del Hoyo, A. Elliott and J. Sargatal.) pp. 216–275. (Lynx Edicions: Barcelona.)

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