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

Movements of frugivorous birds among fragmented rainforests in the Northern Territory, Australia

Owen F. Price

Biodiversity Conservation Unit, Department of Natural Resources, Environment and the Arts, PO Box 496, Palmerston, NT 0831, Australia. Email: owen.price@nt.gov.au

Wildlife Research 33(6) 521-528 http://dx.doi.org/10.1071/WR06029
Submitted: 27 March 2006  Accepted: 11 August 2006   Published: 4 October 2006


Rainforests in the Northern Territory occur as small patches, and the frugivorous birds that depend on them are thought to move among the patches. I attached radio-transmitters to 41 birds of four species captured in several locations near Darwin. I recorded 55 interpatch flights, and estimated flight rates as between once per day and five days for figbirds and pied imperial-pigeons. The flight rates for rose-crowned fruit-doves and yellow orioles were much lower, but no reliable estimate could be made. The median flight distance was 2.5 km but one in five flights were more than 10 km. In addition, one pigeon flew 220 km in preparation for migration from Australia. Birds often undertook exploratory flights, returning to the original patch. Birds of one species captured together usually flew to different locations. When birds left a patch, it was usually to a distant patch, rather than a near neighbour. These movement patterns demonstrate that frugivorous birds use the rainforest network in a complex way. The birds depend on a network of rainforest patches and the pigeons and figbirds probably disperse large quantities of seeds among the patches. The conservation of rainforest ecosystems in northern Australia will depend on the protection of the current configuration of patches rather than a representative set of patches.


Achard F. Eva H. D. Stibig H.-J. Mayaux P. Gallego J. Richards T. Malingreau J.-P. 2002 Determination of deforestation rates of the world’s humid tropical forests. Science 297 999 1002 DOI

Bach C., and Price O. (2005). Fruit resources, frugivore movements and landscape scale conservation in monsoon rainforests of Northern Australia. In ‘Proceedings of the 12th Annual Conference of the Australian Wildlife Management Society, 1999’. (Ed. J. Gorman.) pp. 94–111. (Charles Darwin University: Darwin.)

Beauchamp G. Belisle M. Giraldeau L. A. 1997 Influence of conspecific attraction on the spatial distribution of learning foragers in a patchy habitat. Journal of Animal Ecology 66 671 682 DOI

Bedward M. Pressey R. L. Keith D. A. 1992 A new approach for selecting fully representative reserve networks: addressing efficiency, reserve-design and land suitability with an iterative analysis. Biological Conservation 62 115 125 DOI

Bierregaard R. O. J. Lovejoy T. E. Kapos A. Augusto dos Santos A. Hutchings W. 1992 The biological dynamics of tropical rainforest fragments. Bioscience 42 859 866 DOI

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

Calvo B. Furness R. W. 1992 A review of the use and the effects of marks and devices on birds. Ringing and Migration 13 129 151

Chafer C. J. 1992 Notes on the distribution of and insectivory in the figbird Sphecotheres viridis in the Illawarra and Shoalhaven regions of New South Wales. Australian Bird Watcher 14 282 285

Chavez-Ramirez F. Slack R. D. 1994 Effects of avian foraging and post-foraging behaviour on seed dispersal patterns of Ashe juniper. Oikos 71 40 46

Clout M. N. Gaze P. D. Hay J. R. Karl B. J. 1986 Habitat use and spring movements of New Zealand pigeons at Lake Rotoroa, Nelson Lakes National Park. Notornis 33 37 44

Estrada A. Coates-Estrada R. Meritt D. Jr Montiel S. Curiel D. 1993 Patterns of frugivore species richness and abundance in forest islands and agricultural habitats at Los Tuxtlas, Mexico. Vegetatio 107/108 245 257

Frith C. B. Frith D. W. Moore G. J. 1994 Home range and extra-court activity in the male tooth-billed bowerbird, Scenopoeetes dentirostris (Ptilonorhynchidae). Memoires of the Queensland Museum 37 147 154

Gill F. B. (1990). ‘Ornithology.’ (W.H. Freeman: New York.)

Gosper D. G. 1996 Insectivory in the figbird in northern New South Wales. Sunbird 26 36 38

Green R. 1993 Avian seed dispersal in and near subtropical rainforests. Wildlife Research 20 535 557

Hall B. P. (Ed.) (1974). ‘Birds of the Harold Hall Australian Expeditions.’ (Trustees of the British Museum (Natural History): London.)

Higgins P. J., and Davies S. J. J. F. (Eds) (1996). ‘Handbook of Australian, New Zealand and Antarctic Birds. Volume 3: Snipe to Pigeons.’ (Oxford University Press: Melbourne.)

Holbrook K. M. Smith T. B. Hardesty B. D. 2002 Implications of long-distance movements of frugivorous rain forest hornbills. Ecography 25 745 749 DOI

Howe H. F. Smallwood J. 1982 Ecology of seed dispersal. Annual Review of Ecology and Systematics 13 201 228 DOI

Izhaki I. Walton P. B. Safriel U. N. 1991 Seed shadows generated by frugivorous bird in an eastern mediterranean scrub. Journal of Ecology 79 575 590 DOI

Johnstone , and Burbidge A. H. (1991). The avifauna of Kimberley rainforests. In ‘Kimberley Rainforests’. (Eds N. L. McKenzie, R. B. Johnston and P. G. Kendrick.) (Surrey Beatty: Sydney.)

Karl B. J. Clout M. N. 1987 An improved radio transmitter harness with a weak link to prevent snagging. Journal of Field Ornithology 53 73 77

King B. R. 1990 Distribution and status of the Torresian imperial pigeon Ducula spilorrhoa in north-eastern Queensland: Cooktown to Cape York. Emu 90 248 253

Knopf F. L. Rupert J. R. 1995 Habits and habitats of mountain plovers in California. Condor 97 743 751

Laurance S. G. W. Stouffer P. C. Laurance W. F. 2004 Effects of road clearings on movement patterns of understory rainforest birds in central Amazonia. Conservation Biology 18 1099 1109

Lindsey G. D. Arendt W. J. Pendleton G. W. 1991 Home range and movements of juvenile Puerto Rican parrots. Journal of Wildlife Management 55 318 322

Meyburg B. U. Lobkov E. G. 1994 Satellite tracking of a juvenile Steller’s sea eagle Haliaeetus pelagicus. Ibis 136 105 106

Murray K. G. 1988 Avian seed dispersal of three gap-dependent plants. Ecological Monographs 58 271 298

Nix H., and Kalma J. D. (1972). Climate as a dominant control in the biogeography of northern Australia and New Guinea. In ‘Bridge and Barrier: the Natural and Cultural History of the Torres Strait’. (Ed. D. Walker.) pp. 61–93. (Research School of Pacific Studies, Australian National University: Canberra.)

Palmer C. Woinarski J. C. Z. 1999 Seasonal roosts and foraging movements of the black flying fox (Pteropus alecto) in the Northern Territory: resource tracking in a landscape mosaic. Wildlife Research 26 823 838 DOI

Powell G. V. N. Bjork R. 1995 Implications of intratropical migration on reserve design: a case study using Pharomachrus mocinno. Conservation Biology 9 354 362 DOI

Price O. F. (1998). Frugivorous bird movement and the conservation of monsoon rainforests in the Northern Territory, Australia. Ph.D. Thesis, Australian National University, Canberra.

Price O. F. 2004 Indirect evidence that frugivorous birds track fluctuating fruit resources among rainforest patches in the Northern Territory, Australia. Austral Ecology 29 137 144 DOI

Price O. F. Woinarski J. C. Z. Robinson D. 1999 Very large area requirements for frugivorous birds in monsoon rainforests of the Northern Territory, Australia. Biological Conservation 91 169 180 DOI

Reed J. M. Dobson A. P. 1993 Behavioural constraints and conservation biology: conspecific attraction and recruitment. Trends in Ecology & Evolution 8 253 256 DOI

Rowley I. Chapman G. 1991 The breeding biology, food, social organisation, demography and conservation of the Major Mitchell or pink cockatoo, Cacatua leadbeateri, on the margin of the Western Australian wheatbelt. Australian Journal of Zoology 39 211 261 DOI

Runciman D. Franklin D. Menkhorst P. W. 1995 Movements of helmeted honeyeaters during the non-breeding season. Emu 95 111 118

Russell-Smith J. 1991 Classification, species richness, and environmental relations of monsoon rain forest in northern Australia. Journal of Vegetation Science 2 259 278

Russell-Smith J., and Dunlop C. R. (1987). The status of monsoon vineforests in the Northern Territory: a perspective. In ‘The Rainforest Legacy: Australian National Rainforests Study’. pp. 227–288. (Australian Government Publication Service: Canberra.)

Russell-Smith J. Lee A. H. 1992 Plant populations and monsoon rainforests in the Northern Territory, Australia. Biotropica 24 471 487 DOI

Shanahan M. Harrison R. D. Yamuna R. Boen W. Thornton W. B. 2001 Colonization of an island volcano, Long Island, Papua New Guinea, and an emergent island, Motmot, in its caldera lake. V. Colonization by figs (Ficus spp.), their dispersers and pollinators. Journal of Biogeography 28 1365 1377 DOI

Shapcott A. 2000 Conservation and genetics in the fragmented monsoon rainforest in the Northern Territory, Australia: a case study of three frugivore-dispersed species. Australian Journal of Botany 48 397 407 DOI

Smith G. T. Moore L. A. 1992 Patterns of movement in the western long-billed corella Cacatua pastinator in the south-west of Western Australia. Emu 92 19 27

Stiles F. G. (1985). On the role of birds in the dynamics of neotropical forests. In ‘Conservation of Tropical Forest Birds’. (Eds A. W. Diamond and T. E. Lovejoy.) pp. 49–59. (International Council for Bird Preservation: Cambridge.)

Sugden A. M. 1982 Long-distance dispersal, isolation, and the cloud forest flora of the Serrania de Macuira, Guajira, Colombia. Biotropica 14 208 219

Taylor J. A. Dunlop C. R. 1985 Plant communities of the wet–dry tropics of Australia: the Alligator Rivers region, Northern Territory. Proceedings of the Ecological Society of Australia 13 83 127

Thery M. 1989 Fruit eating and seed dispersal by the blackbird (Turdus merula L.) in a temperate suburban area. Acta Oecologia 10 271 285

Thompson F. R. I. 1994 Temporal and spatial patterns of breeding brown-headed cowbirds in the midwestern United States. Auk 111 979 990

Thorsborne A. S. Thorsborne M. G. Winter J. W. 1988 Population changes of the Torresian imperial-pigeon Ducula spilorrhoa over twenty-one years on North Brook Island, North Queensland. Emu 88 1 8

Westcott D. A. Graham D. L. 2000 Patterns of movement and seed dispersal of a tropical frugivore. Oecologia 122 249 257

Whitmore T. C. (1997). Tropical forest disturbance, disappearence and species loss. In ‘Tropical Forest Remnants’. (Eds W. F. Laurance and R. O. Bierregaard.) pp. 2–12. (University of Chicago Press: Chicago.)

Whittaker R. Jones S. H. 1994 The role of bats and birds in the rebuilding of a tropical forest ecosystem, Krakatau, Indonesia. Journal of Biogeography 21 245 258 DOI

Woinarski J. C. Z. 1993 A cut-and-paste community: birds in monsoon rainforests in Kakadu National Park, Northern Territory. Emu 93 100 120

Woinarski J. C. Z. Whitehead P. J. Bowman D. J. M. S. Russell-Smith J. 1992 Conservation of mobile species in a variable environment: the problem of reserve design in the Northern Territory, Australia. Global Ecology and Biogeography Letters 2 1 10

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