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Location Australia, Western Australia
Central coordinates 123o 9.50' East  15o 31.45' South
IBA criteria A4i, A4ii
Area 276 ha
Altitude 0 - 5m
Year of IBA assessment 2008

BirdLife Australia



Summary Adele Island IBA supports more than 1% of the world's population of Brown Boobies, Lesser Frigatebirds, Red-necked Stint and Grey-tailed Tattler.

Site description Adele Island is a low, flat, sandy cay about 100 km north-north-east of Cape Leveque, north of Broome in Western Australia. It is 2.9 km by 1.6 km and with a maximum height of 4 m but surrounded by 25 km by 11 km of reefs and sand banks. The island is vegetated sand with a large tidal lagoon and a mast, beacon and weather station. The lowest, most frequently inundated areas support grasslands of Sporobolus virginicus, on which Brown Boobies nest, while slightly elevated soils have a dense cover of Spinifex longifolius, on which Lesser Frigatebirds nest. It has a wet-dry monsoonal climate with short, wet summers and dry autumn, winter and spring.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Lesser Frigatebird Fregata ariel resident  1982  2,000-5,700 breeding pairs  A4ii  Least Concern 
Brown Booby Sula leucogaster resident  1972-1993  1,500-8,500 breeding pairs  A4ii  Least Concern 
Grey-tailed Tattler Tringa brevipes non-breeding  2004  5,489 individuals  good  A4i  Near Threatened 
Red-necked Stint Calidris ruficollis non-breeding  2004  4,107 individuals  good  A4i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Adele Island Nature Reserve 217 is identical to site 217  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Coastline Sea cliffs, rocky shores & rocky islets  100%

Land ownership Western Australia State Government with management the responsibility of Dept of Environment & Conservation.

Land use

Land-use Extent (% of site)
nature conservation and research 100%

Other biodiversity Green Turtles have been seen mating off shore and 8 new turtle nest were discovered, they were presumed to be Green Turtle nests (Boyle et al., 2006). Polynesian Rat.

Protection status The IBA is the Adele Island Nature Reserve.

Access/Land-Owner requests Apply to DEC for permission.

Acknowledgements The nomination was prepared by Andrew Burbidge with consultation with DEC.

References Boyle, A., Swann, G., Willing, T., Gale, T., and Collins, P. (2006). Adele Island Survey Report. Unpublished.

Burbidge, A.A., Fuller, P.J., Lane, J.A.K. & Moore, S.A. 1987. Counts of nesting boobies and Lesser Frigate-birds in Western Australia. Emu 87, 128-9.

Burbidge, A.A. and McKenzie, N.L. 1978. The islands of the north-west Kimberley, Western Australia. Wildlife Research Bulletin of Western Australia 7: 1-47. [Western Australian Wildlife Research Centre, Dept of Fisheries and Wildlife, Perth, WA.]

Coate, K. 1997. Adele Island, Western Australia. Corella 21: 124-128.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Adele Island. Downloaded from http://www.birdlife.org on 01/08/2014

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