Riverina Plains (23857)
Australia, Australasia

Site overview

KBA status: confirmed

Global KBA criteria: A1a, B1

Year of last assessment: 2009

National site name: Riverina Plains

Central coordinates: Latitude: -34.8462, Longitude: 145.4478

System: terrestrial

Elevation (m): 85 to 275

Area of KBA (km²): 10732.52157

Protected area coverage (%): 2.41

KBA classification: Global

Legacy site: Yes

Site details

Site description: This IBA is defined as the known and projected core distribution of Plains-wanderers, including known localities and nearby areas mapped as 'primary habitat'. Plains-wanderers may also use lower-quality paddocks at times (e.g. paddocks which have been ploughed) and move between paddocks, depending on the amount of grass. The IBA is therefore mapped as two simple polygons covering the known areas of global importance for Plains-wanderers and large areas of primary habitat (which have been mapped accurately by Roberts and Roberts 2001) but not surveyed adequately (the species is difficult to survey and requires a high survey effort to ascertain an area's importance for this species), but also including large areas of intervening agricultural land which is currently of little or no value for this species. It includes the known areas with many Plains-wanderer records at Wanganella/Booroorban, north-east of Conargo and at Oolambeyan. The importance of identifying such a large area is underlined by the NSW NPWS habitat mapping, which classified only 2.3% of 2.28 million ha as primary Plains-wanderer habitat and a further 4.3% as secondary habitat. Within this IBA, the Plains-wanderer Recovery Team has identified seven Core Areas which support around 72% of the population and cover 340,278 ha (NSW NPWS 2002). Primary habitat is the sparse winter-growing native Austrodanthonia / Austrostipa grasslands on the Riverina plains. Ideal habitat is 50% bare ground and 10% fallen litter, with the remaining 40% made up of herbs and grasses, with grass tussocks spaced 10-20 cm apart. Most of the vegetation is below 5 cm high, with some vegetation up to a maximum of 30 cm, which is important for concealment. The Plains-wanderer has become a 'flagship' species for these native grasslands.

Rationale for qualifying as KBA: This site qualifies as a Key Biodiversity Area of international significance that meets the thresholds for at least one criterion described in the Global Standard for the Identification of KBAs.

Additional biodiversity: The Riverina Plains support good populations of other grassland birds (NSW NPWS 2002), including Brown Songlark, Richard's Pipit, Banded Lapwing and Singing Bushlark. There have been infrequent sightings of the endangered Australasian Bittern and the arid biome-restricted Inland Dotterel. For example, a count of 40 Inland Dotterel was made south of Oolambeyan National Park in 2006, with breeding observed near Jerilderie; and the same species was categorized as uncommon north of Conargo by D. Parker (pers. comm. 2007). Superb Parrot, Painted Honeyeater and Diamond Firetail have been recorded in non-grassland elements of the IBA.

Other site values: Mostly private land-owners and leaseholders; a network of travelling stock reserves managed by Rural Lands Protection Boards; one National Park managed by NPWS.

Habitats

Land use: agriculture | nature conservation and research | rangeland/pastureland

IUCN Habitat	Coverage %	Habitat detail
Artificial - Terrestrial	50
Grassland	50

Threats

Summary of threats to biodiversity at KBA: Paddocks with Plains-wanderers should be managed by light to moderate grazing and not overgrazed or cultivated. Land-holders interested in managing areas for Plains-wanderers should seek incentive-based land management opportunities from their local catchment management authority.

Threat level 1	Threat level 2	Threat level 3	Timing
Agriculture & aquaculture	Livestock farming & ranching	Agro-industry grazing, ranching or farming	Ongoing
Invasive & other problematic species, genes & diseases	Invasive non-native/alien species/diseases	Unspecified species	Ongoing
Human intrusions & disturbance	Recreational activities		Ongoing

Additional information

References: Baker-Gabb, D. (1998) Birds Australia Conservation Statement No. 1 - Native grasslands and Plains Wanderer. Wingspan Vol 8 No. 1: supplement. NSW NPWS (2002) Plains-wanderer (Pedionomus torquatus) Recovery Plan. Draft for public comment October 2002. Hurstville, NSW: NSW NPWS. Roberts, I. and Roberts, J. (2001) Plains wanderer (Pedionomus torquatus) habitat mapping. Earth Resource Analysis Pty Ltd for NSW NPWS.