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Location Australia, Western Australia
Central coordinates 115o 41.05' East  32o 54.75' South
IBA criteria A1, A4i
Area 5,935 ha
Altitude 0 - 10m
Year of IBA assessment 2008

BirdLife Australia



Summary This IBA supports the vulnerable Fairy Tern, large numbers of the near-threatened Hooded Plover and regularly supports more than 1% of the global population of Australian Shelduck, Red-necked Stint and Banded Stilt, and sometimes Musk Duck.

Site description The Yalgorup IBA includes the wetlands of the Yalgorup National Park, south of Mandurah and in the shires of Murray, Waroona and Harvey in Western Australia. This IBA lies as close as 2 km from the Peel-Harvey IBA but appears to be used by waterbirds as a distinct wetland system. The National Park was designated in February 1990 and extended in 2001 to comprise the major wetlands of Lakes Clifton, Preston, Boundary, Pollard, Martins Tank, Yalgorup, Hayward and Newnham, and adjacent bushlands. The Yalgorup lakes vary from about 1-4 metres in depth and are evaporative salt lakes principally supplied by fresh groundwater and precipitation. Lake Clifton has extensive areas of groundwater seepage, which result in pronounced horizontal salinity gradients; away from the shoreline the salinity varied from about 8 to 32 ppt during the 1980s, however, salinity measurements from the late 1990s ranged from 25 to 49 ppt. Median annual rainfall at Mandurah is 879 mm, mostly falling in May-August. Some of the lakes are fringed by samphire flats and rushes and sedges. Beyond this is a zone of trees dominated by Melaleuca around hyposaline lakes; and Melaleuca cuticularis and Acacia cyclops around hypersaline lakes. Large parts of the shoreline throughout Yalgorup have been cleared, mostly for agriculture. The IBA could be extended to include the bushland if it is shown to support significant numbers of Carnaby's Black-Cockatoos, which are relatively common non-breeding visitors. The IBA is part of the Peel-Yalgorup Ramsar site.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Australian Shelduck Tadorna tadornoides resident  1986-2007  3,000-13,782 individuals  A4i  Least Concern 
Musk Duck Biziura lobata resident  1986-2007  50-2,302 individuals  A4i  Least Concern 
Banded Stilt Cladorhynchus leucocephalus non-breeding  1986-2008  2,500-18,000 individuals  A4i  Least Concern 
Hooded Plover Thinornis rubricollis resident  1998-2007  37-170 individuals  A1, A4i  Vulnerable 
Red-necked Stint Calidris ruficollis non-breeding  1986-2005  328-15,000 individuals  A4i  Least Concern 
A4iii Species group - seabirds    

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Yalgorup National Park 13,090 protected area overlaps with site 5,478  

Habitats

IUCN habitat Habitat detail Extent (% of site)
Shrubland Other shrublands  minor
Wetlands (inland) Freshwater lakes & pools; Salt marshes  major
Coastline Estuarine waters; Lagoons  minor

Land ownership Western Australia state government with management the responsibility of DEC.

Land use

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

Other biodiversity The site also holds significant populations of three threatened mammals, Chuditch (Dasyurus geoffroii), Southern Brown Bandicoot (Isoodon obesulus) and Western Ringtail Possum (Pseudocheirus occidentalis).

Protection status Wetland portion of the Yalgorup National Park.

Acknowledgements Thanks to William Rutherford and Michael Craig for compiling the nomination and to Bill Russell for his comments.

References Davis, C. (2003) Mid Summer Wader Count 2003. WA Bird Notes 106: 9-11.

DEWHA (2008) Directory of Important Wetlands in Australia. Information Sheet on Ramsar Wetlands (RIS) for Peel-Yalgorup System, Western Australia. Downloaded from http://www.environment.gov.au/water/publications/environmental/wetlands/database/ on November 2007.

DEWHA (2008) Directory of Important Wetlands in Australia. Yalgorup Lakes System - WA095. Downloaded from http://www.environment.gov.au/water/publications/environmental/wetlands/database/ on November 2007.

Jaensch, R.P., Vervest, R.M. and Hewish, M.J. (1988) Waterbirds in nature reserves of south-western Australia, 1981-1985: reserve accounts. Royal Australasian Ornithologists Union Report 30: 1-290.

Russell, B. (2000) Waders in Yalgorup National Park: A report on waders recorded on the lakes in the Yalgorup National Park from 1 January 1994 to 31 December 1999. WA Bird Notes 93: 12-16.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Yalgorup. Downloaded from http://www.birdlife.org on 20/04/2014

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