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

Monitoring waterbird populations with aerial surveys – what have we learnt?

R. T. Kingsford A B and J. L. Porter A

A School of Biological, Earth and Environmental Sciences, University of New South Wales, NSW 2052, Australia.

B Corresponding author. Email: richard.kingsford@unsw.edu.au

Wildlife Research 36(1) 29-40 http://dx.doi.org/10.1071/WR08034
Submitted: 29 February 2008  Accepted: 1 July 2008   Published: 21 January 2009

Abstract

We can use aerial surveys of waterbirds to identify high-conservation-value wetlands, estimate species’ abundance and track changes in wetland condition. Two major approaches prevail. Transects to estimate a few species (1–20, often ducks) are predominantly used in North America and counts of entire waterbird assemblages on discrete wetlands are favoured in Australia. Such differences reflect wetland type, discrete (whole count) and continuous (transect) sampling, different objectives and history. There are few continuous large-scale aerial surveys of waterbirds, despite cost efficiencies and effectiveness. We review the eastern Australian waterbird survey that samples about one-third of the continent (2.697 million km2). Each October, during 1983–2007, all waterbirds were estimated on an average of 811 wetlands, within ten 30-km-wide survey bands, separately extending across latitudes from the east coast to central Australia. The survey has demonstrated the importance of arid wetlands for waterbirds and provided management data on distribution, abundance and breeding of waterbirds. Most significantly, long-term temporal data for individual wetlands provided strong evidence for the impacts of water resource development (dam building, diversion of water). These data have influenced wildlife management, river rehabilitation and restoration policies at a national scale.


References

Barnes A. Hill G. J. E. Wilson G. R. 1986 Correcting for incomplete sighting in aerial surveys of kangaroos. Australian Wildlife Research 13 339 348 doi:10.1071/WR9860339

Bayliss P. 1986 Factors affecting aerial surveys of marine fauna, and their relationship to a census of dugongs in the coastal waters of the Northern Territory. Australian Wildlife Research 13 27 37 doi:10.1071/WR9860027

Bayliss P. Yeomans K. M. 1990 a Seasonal distribution and abundance of magpie geese Anseranas semipalmata Latham, in the Northern Territory, and their relationship to habitat, 1983–86. Australian Wildlife Research 17 15 38 doi:10.1071/WR9900015

Bayliss P. Yeomans K. M. 1990 b Use of low-level aerial photography to correct bias in aerial survey estimates of magpie goose and whistling duck density in the Northern Territory. Australian Wildlife Research 17 1 10 doi:10.1071/WR9900001

Blohm R. J. , Sharp D. E. , Padding P. I. , and Richkus K. D. (2006). Monitoring North America’s waterfowl resource. In ‘Waterbirds Around the World’. (Eds G. C. Boere, C. A. Galbraith and D. A. Stroud.) pp. 448–452. (The Stationery Office: Edinburgh.)

Boere G. C. , Galbraith C. A. , and Stroud D. A. (Eds) (2006). ‘Waterbirds Around the World.’ (The Stationery Office: Edinburgh.)

Braithwaite L. W. , Maher M. T. , Briggs S. V. , and Parker B. S. (1985 a). An aerial survey of wetland bird fauna in eastern Australia. October 1983. CSIRO Division of Wildlife & Rangelands Research Technical Memorandum No. 21.

Braithwaite L. W. , Maher M. T. , and Parker B. S. (1985 b). An aerial survey of wetland bird fauna in eastern Australia. October 1984. CSIRO Division of Wildlife & Rangelands Research Technical Memorandum No. 23.

Braithwaite L. W. Maher M. Briggs S. V. Parker B. S. 1986 An aerial survey of three game species of waterfowl (Family Anatidae) in eastern Australia. Australian Wildlife Research 13 213 223 doi:10.1071/WR9860213

Briggs S. V. 1982 Food habits of the freckled duck and associated waterfowl in north-western New South Wales. Wildfowl 33 88 93

Briggs S. V. Brown B. K. Maher M. T. Brickhill J. G. Kingsford R. T. 1983 Mortality of maned duck and grey teal during the 1982 Open Season at Barrenbox Swamp, N.S.W. Australian Wildlife Research 10 537 541
doi:10.1071/WR9830537

Briggs S. V. Maher M. T. Palmer R. P. 1985 Bias in food habits of Australian waterfowl. Australian Wildlife Research 12 507 514 doi:10.1071/WR9850507

Briggs S. V. Brickhill J. G. Kingsford R. T. Hodgson P. F. 1993 Ducks, hunters and rainfall at two sites in southern inland New South Wales. Wildlife Research 20 759 769 doi:10.1071/WR9930759

Bromley R. G. Heard D. C. Croft B. 1995 Visibility bias in aerial surveys relating to nest success of Arctic geese. Journal of Wildlife Management 59 364 371 doi:10.2307/3808950

Broome L. S. 1985 Sightability as a factor in aerial survey of bird species and communities. Australian Wildlife Research 12 57 67 doi:10.1071/WR9850057

Caughley G. 1974 Bias in aerial survey. Journal of Wildlife Management 38 921 933 doi:10.2307/3800067

Caughley G. 1977 Sampling in aerial survey. Journal of Wildlife Management 41 605 615 doi:10.2307/3799980

Caughley G. Goddard J. 1972 Improving the estimates from inaccurate censuses. Journal of Wildlife Management 36 135 140 doi:10.2307/3799197

Caughley G. Sinclair R. Scott-Kemmis D. 1976 Experiments in aerial survey. Journal of Wildlife Management 40 290 300 doi:10.2307/3800428

Conroy M. J. Goldsberry J. R. Hines J. E. Stotts D. B. 1988 Evaluation of aerial transect surveys for wintering American black ducks. Journal of Wildlife Management 52 694 703 doi:10.2307/3800933

Cook R. D. Jacobson J. O. 1979 A design for estimating bias in aerial surveys. Biometrics 35 735 742 doi:10.2307/2530104

Cranswick P. , Hall C. , and Smith L. (2006). Assessing the numbers and distribution of waterbirds in UK inshore marine waters. In ‘Waterbirds around the world’. (Eds G. C. Boere, C. A. Galbraith and D. A. Stroud.) pp. 754–755. (The Stationery Office: Edinburgh.)

Crête M. Vandal D. Rivest L. P. Potvin F. 1991 Double counts in aerial surveys to estimate polar bear numbers during the ice-free period. Arctic 44 275 278

Dexter N. 1990 Density dependent bias in aerial counts of magpie goose nests. Australian Wildlife Research 17 447 451
doi:10.1071/WR9900447

Diem K. L. Lu K. H. 1960 Factors influencing waterfowl censuses in the parklands, Alberta, Canada. Journal of Wildlife Management 24 113 133 doi:10.2307/3796737

Dolbeer R. A. Belant J. L. Bernhardt G. E. 1997 Aerial photography techniques to estimate populations of laughing gull nests in Jamaica Bay, New York, 1992–1995. Colonial Waterbirds 20 8 13 doi:10.2307/1521758

Dorfman E. J. (1997). Scale dependent habitat utilization of the cormorants (Phalacrocorax spp.) in eastern Australia. Ph.D. Thesis, University of Sydney.

Drewien R. C. Benning D. S. 1997 Status of tundra swans and trumpeter swans in Mexico. The Wilson Bulletin 109 693 701

Drewien R. C. Brown W. M. Benning D. S. 1996 Distribution and abundance of sandhill cranes in Mexico. Journal of Wildlife Management 60 270 285
doi:10.2307/3802225

Eggeman D. R. Johnson F. A. Conroy M. J. Brakhage D. H. 1997 Evaluation of an aerial quadrat survey for monitoring wintering duck populations. Journal of Wildlife Management 61 403 412 doi:10.2307/3802597

Frederick P. , and Ogden J. C. (2003). Monitoring wetland ecosystems using avian populations: seventy years of surveys in the Everglades. In ‘Monitoring Ecosystems’. (Eds D. E. Busch and J. C. Trexler.) pp. 321–350. (Island Press: Washington, DC.)

Frederick P. C. Towles T. Sawicki R. J. Bancroft G. T. 1996 Comparison of aerial and ground techniques for discovery and census of wading bird (Ciconiiformes) nesting colonies. The Condor 98 837 841 doi:10.2307/1369865

Frith N. J. (1982). ‘Waterfowl in Australia.’ (Angus & Robertson: Sydney.)

Gabor T. S. Gadawski T. R. Ross R. K. Rempel R. S. Kroeker D. W. 1995 Visibility bias of waterfowl brood surveys using helicopters in the Great Clay Belt of northern Ontario. Journal of Field Ornithology 66 81 87

Garnett S. 1987 Aerial surveys of waders (Aves, Charadriiformes) along the coast of northeastern Australia. Australian Wildlife Research 14 521 528
doi:10.1071/WR9870521

Goss K. F. 2003 Environmental flows, river salinity and biodiversity conservation: managing trade-offs in the Murray–Darling basin. Australian Journal of Botany 51 619 625 doi:10.1071/BT03003

Halse S. A. , and Pearson G. B. (1993). Survey of magpie geese in Western Australia. States Cooperative Assistance Program Project 4474. Report to Australian Nature Conservation Agency, Canberra.

Halse S. A. , Jaensch R. P. , Munro D. R. , and Pearson G. B. (1990). Annual waterfowl counts in south-western Australia – 1988/89. Department of Conservation and Land Management Technical Report No. 25.

Halse S. A. , Vervest R. M. , Munro D. R. , Pearson G. B. , and Yung F. H. (1992). Annual waterfowl counts in south-western Australia – 1989/90. Department of Conservation and Land Management Technical Report No. 29.

Halse S. A. Vervest R. M. Pearson G. B. Yung F. H. Fuller P. J. 1994 Annual waterfowl counts in south-western Australia – 1990/91. CalmScience 1 107 129

Halse S. A. Burbidge A. A. Lane J. A. K. Haberley B. Pearson G. B. Clarke A. 1995 a Size of the Cape Barren Goose population in Western Australia. Emu 95 77 83
doi:10.1071/MU9950077

Halse S. A. Pearson G. B. Vervest R. M. Yung F. H. 1995 b Annual waterfowl counts in south-western Australia – 1991/92. CalmScience 2 1 24

Halse S. A. Shiel R. J. Pearson G. B. 1996 Waterbirds and aquatic invertebrates of swamps on the Victoria Bonaparte mudflat, northern Western Australia. Journal of the Royal Society of Western Australia 79 31 38


Halse S. A. Pearson G. B. Kay W. R. 1998 Arid zone networks in time and space: waterbird use of Lake Gregory in north-western Australia. International Journal of Ecology and Environmental Sciences 24 207 222


Halse S. A. Pearson G. B. Hassell C. Collins P. Scanlon M. D. Minton C. D. T. 2005 Mandora Marsh, north-western Australia, an arid-zone wetland maintaining continental populations of waterbirds. Emu 105 115 125
doi:10.1071/MU04021

Hodges J. I. , King J. G. , Conant B. , and Hanson H. A. (1996). Aerial surveys of waterbirds in Alaska 1957–94: population trends and observer variability. National Biological Service Technical Report Series. US Department of Interior, National Biological Service, Alaska.

Jackson J. A. 1985 An evaluation of aerial survey techniques for red-cockaded woodpeckers. Journal of Wildlife Management 49 1083 1088 doi:10.2307/3801399

Jaensch R. P. (1994). Waterbird breeding and populations in the Barkly Lakes Region in the 1993–4 wet season. Report to the Conservation Commission of the Northern Territory, Darwin.

Jaensch R. P. , and Vervest R. M. (1988). Ducks, swans and coots in south-western Australia: the 1986 and 1987 counts. Royal Australasian Ornithologists Union.

Joensen A. H. 1968 Wildfowl counts in Denmark in November 1967 and January 1968 – methods and results. Danish Review of Game Biology 5 1 70

Joensen A. H. 1974 Wildfowl populations in Denmark 1965–1973. Danish Review of Game Biology 9 1 206


Johnson F. A. Pollock K. H. Montalbano F. III 1989 Visibility bias in aerial surveys of mottled ducks. Wildlife Society Bulletin 17 222 227


Johnson S. R. Noel L. E. Gazey W. J. Hawkes V. C. 2005 Aerial monitoring of marine waterfowl in the Alaskan Beaufort Sea. Environmental Monitoring and Assessment 108 1 43
doi:10.1007/s10661-005-3958-5

Jolly G. M. 1969 a Sampling methods for aerial censuses of wildlife populations. East African Agricultural Forest Journal 34 Special issue 46 49

Jolly G. M. 1969 b Sampling methods for aerial censuses of wildlife populations. East African Agricultural Forest Journal 34 Special issue 50 55


Kingsford R. T. 1995 Occurrence of high concentrations of waterbirds in arid Australia. Journal of Arid Environments 29 421 425
doi:10.1016/S0140-1963(05)80120-X

Kingsford R. T. (1996) Wildfowl (Anatidae) movements in arid Australia. In ‘Proceedings of the Anatidae 2000 Conference, Strasbourg, France, 5–9 December 1994’. (Eds M. Birkan, J. van Vessem, P. Havet, J. Madsen, B.Trolliet and M. Moser.) Gibier Faune Sauvage, Game Wildlife 13, 141–155.

Kingsford R. T. 1999 Aerial survey of waterbirds on wetlands as a measure of river and floodplain health. Freshwater Biology 41 425 438 doi:10.1046/j.1365-2427.1999.00440.x

Kingsford R. T. 2000 Ecological impacts of dams, water diversions and river management on floodplain wetlands in Australia. Austral Ecology 25 109 127 doi:10.1046/j.1442-9993.2000.01036.x

Kingsford R. T. Norman F. I. 2002 Australian waterbirds – products of a continent’s ecology. Emu 102 47 69 doi:10.1071/MU01030

Kingsford R. T. Porter J. L. 1993 Waterbirds of Lake Eyre, Australia. Biological Conservation 65 141 151 doi:10.1016/0006-3207(93)90443-5

Kingsford R. T. Porter J. L. 1994 Waterbirds on an adjacent freshwater and salt lake in arid Australia. Biological Conservation 69 219 228 doi:10.1016/0006-3207(94)90063-9

Kingsford R. T. Thomas R. F. 1995 The Macquarie Marshes and its waterbirds in arid Australia: a 50-year history of decline. Environmental Management 19 867 878 doi:10.1007/BF02471938

Kingsford R. T. Thomas R. F. 2004 Destruction of wetlands and waterbird populations by dams and irrigation on the Murrumbidgee River in arid Australia. Environmental Management 34 383 396 doi:10.1007/s00267-004-0250-3

Kingsford R. T. , Bedward M. , and Porter J. (1994). Wetlands and waterbirds in northwestern New South Wales. National Parks and Wildlife Service Occasional Paper No. 19.

Kingsford R. T. , Tully S. , and Davis S. T. (1997 a). Aerial surveys of wetland birds in eastern Australia – October 1994 and 1995. New South Wales National Parks and Wildlife Service Occasional Paper No. 28.

Kingsford R. T. , Thomas R. F. , and Wong P. S. (1997 b). Significant wetlands for waterbirds in the Murray–Darling Basin. Report to the Murray–Darling Basin, NSW National Parks and Wildlife Service.

Kingsford R. T. Boulton A. J. Puckridge J. T. 1998 Challenges in managing dryland rivers crossing political boundaries: lessons from Cooper Creek and the Paroo River, central Australia. Aquatic Conservation: Marine & Freshwater Ecosystems 8 361 378 doi:10.1002/(SICI)1099-0755(199805/06)8:3<361::AID-AQC294>3.0.CO;2-V

Kingsford R. T. Curtin A. L. Porter J. L. 1999 a Water flows on Cooper Creek determine ‘boom’ and ‘bust’ periods for waterbirds. Biological Conservation 88 231 248 doi:10.1016/S0006-3207(98)00098-6

Kingsford R. T. Wong P. S. Braithwaite L. W. Maher M. T. 1999 b Waterbird abundance in eastern Australia, 1983–1992. Wildlife Research 26 351 366 doi:10.1071/WR96062

Kingsford R. T. Brandis K. Thomas R. Crighton P. Knowles E. Gale E. 2004 a Classifying landform at broad spatial scales: the distribution and conservation of wetlands in New South Wales, Australia. Marine and Freshwater Research 55 17 31 doi:10.1071/MF03075

Kingsford R. T. Jenkins K. M. Porter J. L. 2004 b Imposed hydrological stability on lakes in arid Australia and effect on waterbirds. Ecology 85 2478 2492 doi:10.1890/03-0470

Kreuzberg-Mukhina E. (2006). The effect of habitat change on the distribution of waterbirds in Uzbekistan and the possible implications of climate change. In ‘Waterbirds Around the World’. (Eds G. C. Boere, C. A. Galbraith and D. A. Stroud.) pp. 277–282. (The Stationery Office: Edinburgh.)

Lemly A. D. Kingsford R. T. Thompson J. R. 2000 Irrigated agriculture and wildlife conservation: conflict on a global scale. Environmental Management 25 485 512 doi:10.1007/s002679910039

Marsh H. Sinclair D. F. 1989 Correcting for visibility bias in strip transect aerial surveys of aquatic fauna. Journal of Wildlife Management 53 1017 1024 doi:10.2307/3809604

Martin F. W. , Pospahala R. S. , and Nichols J. D. (1979). Assessment and population management of North American migratory birds. In ‘Environmental Biomonitoring, Assessment, Prediction and Management – Certain Case Studies and Related Quantitative Issues’. pp. 187–239 (International Co-operative Publishing House: Maryland) .

McLaren P. L. McLaren M. A. 1982 Migration and summer distribution of lesser snow geese in interior Keewatin. The Wilson Bulletin 94 494 504

Minton C. Jessop R. 1994 The 1994 north-west wader expedition. Stilt 25 8 11


Minton C. Martindale J. 1982 Report on wader expedition to north-west Australia in August/September 1981. Stilt 2 14 26


Mlingwa C. , and Baker N. (2006). Lesser flamingo Phoenicopterus minor counts in Tanzanian soda lakes: implications for conservation. In ‘Waterbirds Around the World’. (Eds G. C. Boere, C. A. Galbraith and D. A. Stroud.) pp. 230–233. (The Stationery Office: Edinburgh.)

Morton S. R. Brennan K. G. Armstrong M. D. 1990 a Distribution and abundance of ducks in the Alligator Rivers Region, Northern Territory. Australian Wildlife Research 17 573 590
doi:10.1071/WR9900573

Morton S. R. Brennan K. G. Armstrong M. D. 1990 b Distribution and abundance of magpie geese, Anseranas semipalmata, in the Alligator Rivers Region, Northern Territory. Australian Journal of Ecology 15 307 320 doi:10.1111/j.1442-9993.1990.tb01035.x

Morton S. R. Brennan K. G. Armstrong M. D. 1993 a Distribution and abundance of brolgas and black-necked storks in the Alligator Rivers Region, Northern Territory. Emu 93 88 92

Morton S. R. Brennan K. G. Armstrong M. D. 1993 b Distribution and abundance of grebes, pelicans, darters, cormorants, rails and terns in the Alligator Rivers Region, Northern Territory. Wildlife Research 20 203 217
doi:10.1071/WR9930203

Morton S. R. Brennan K. G. Armstrong M. D. 1993 c Distribution and Abundance of herons, egrets, ibises and spoonbills in the Alligator Rivers Region, Northern Territory. Wildlife Research 20 23 43 doi:10.1071/WR9930023

Mosbech A. Boertmann D. 1999 Distribution, abundance and reaction to aerial surveys of post-breeding king eiders (Somateria spectabilis) in western Greenland. Arctic 52 188 203

Nebel S. Porter J. L. Kingsford R. T. 2008 Long-term trends of shorebird populations in eastern Australia and impacts of freshwater extraction. Biological Conservation 141 971 980
doi:10.1016/j.biocon.2008.01.017

Nilsson L. 1975 Midwinter distribution and numbers of Swedish Anatidae. Ornis Scandinavica 6 83 107 doi:10.2307/3676281

Nilsson L. 1977 November distribution and numbers of Swedish Anatidae. Viltrevy (Stockholm) 10 41 77

NLWRA (National Land and Water Resources Audit) (2001). ‘Australian Water Resources Assessment 2000.’ (Commonwealth of Australia: Canberra.)

Padding P. I. , Gobeil J. , and Wentworth C. (2006). Estimating waterfowl harvest in North America. In ‘Waterbirds Around the World’. (Eds G. C. Boere, C. A. Galbraith and D. A. Stroud.) pp. 849–852. (The Stationery Office: Edinburgh)

Pérez-Arteaga A. Gaston K. J. 2004 Wildfowl population trends in Mexico, 1961–2000: a basis for conservation planning. Biological Conservation 115 343 355
doi:10.1016/S0006-3207(03)00088-0

Pollock K. H. Kendall W. L. 1987 Visibility bias in aerial surveys: a review of estimation procedures. Journal of Wildlife Management 51 502 510 doi:10.2307/3801040

Reid J. , Potts R. , Ziembicki M. , and Jaensch R. (2006). Aerial survey of waterbirds in the northern Tanami Desert. Wetlands International Oceania, Brisbane.

Reinecke K. J. Brown M. W. Nassar J. R. 1992 Evaluation of aerial transects for counting wintering mallards. Journal of Wildlife Management 56 515 525 doi:10.2307/3808867

Rodgers J. A. Linda S. B. Nesbitt S. A. 1995 Comparing aerial estimates with ground counts of nests in wood stork colonies. Journal of Wildlife Management 59 656 666 doi:10.2307/3801941

Rodgers J. A. Kubilis P. S. Nesbitt S. A. 2005 Accuracy of aerial surveys of waterbird colonies. Waterbirds 28 230 237 doi:10.1675/1524-4695(2005)028[0230:AOASOW]2.0.CO;2

Roshier D. A. Robertson A. I. Kingsford R. T. Green D. G. 2001 a Continental-scale interactions with temporary resources may explain the paradox of large populations of desert waterbirds in Australia. Landscape Ecology 16 547 556 doi:10.1023/A:1013184512541

Roshier D. A. Whetton P. H. Allan R. J. Robertson A. I. 2001 b Distribution and persistence of temporary wetland habitats in arid Australia in relation to climate. Austral Ecology 26 371 384 doi:10.1046/j.1442-9993.2001.01122.x

Roshier D. A. Robertson A. I. Kingsford R. T. 2002 Responses of waterbirds to flooding in an arid region of Australia and implications for conservation. Biological Conservation 106 399 411 doi:10.1016/S0006-3207(01)00268-3

Roshier D. Asmus M. Klaassen M. 2008 a What drives long-distance movements in the nomadic grey teal Anas gracilis in Australia? The Ibis in press

Roshier D. A. Doerr V. A. J. Doerr E. D. 2008 b Animal movement in dynamic landscapes: interaction between behavioural strategies and resource distributions. Oecologia
in press.

Routledge R. D. 1981 The unreliability of population estimates from repeated, incomplete aerial surveys. Journal of Wildlife Management 45 997 1000
doi:10.2307/3808112

Schneider J. P. Tacha T. C. Leafloor J. O. 1994 Potential predictors of numbers of Canada goose nests from aerial surveys. Wildlife Society Bulletin 22 3 431 436

Smith D. R. Reinecke K. J. Conroy M. J. Brown M. W. Nassar J. R. 1995 Factors affecting visibility rate of waterfowl surveys in the Mississippi Alluvial Valley. Journal of Wildlife Management 59 515 527
doi:10.2307/3802458

Stafford-Smith D. M. Morton S. R. 1990 A framework for the ecology of arid Australia. Journal of Arid Environments 18 255 278



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