Paroo-Darling National Park: Mapped Protected Landscape and Australian Geography

Paroo-Darling National Park is best known for its remarkable artesian mound springs, which are considered the rarest landform in Australia and the only example of such springs protected within a New South Wales reserve. The park protects the Paroo River Wetlands, a Ramsar-listed site of international importance for waterbirds. The ephemeral lake system of Peery and Poloko Lakes transforms the arid landscape into a vital drought refuge, supporting massive waterbird gatherings of up to 35,900 birds when flooded. The park also protects the endangered salt pipewort, one of the rarest vascular plant species in New South Wales, found only at the Lake Peery mound springs.

The Aboriginal Paakantyi people lived in this region for thousands of years, leaving behind evidence of their occupation in hearth sites, stone tool scatters and scarred trees where bark was harvested. European exploration began with Charles Sturt's expedition in 1844, who was followed in the 1860s by pastoralists seeking land for sheep and cattle. The area became part of the massive 8,480 square kilometre Momba Station, which was progressively subdivided from 1902 until 1950 when the remainder was divided into ten leases including Peery, Mandalay and Arrowbar. The formation of Paroo-Darling National Park resulted from the systematic purchase of seven properties between 2000 and 2003 by the Government of New South Wales, with support from the National Reserve System Program. The former Peery property was the first acquired by NSW National Parks and Wildlife Service and was gazetted as Peery National Park on 31 March 2000. In 2001 the Mandalay and Arrowbar pastoral properties were added, and the park was re-gazetted under its current name in 2002. The park is managed in cooperation with the Paroo-Darling National Park Elders Council, recognizing the ongoing cultural connection of Aboriginal people to this Country.

The park encompasses a diverse array of landforms characteristic of arid Australia, centered on the grey cracking clays and red sand hills of the Darling River floodplains. The Peery Hills in the northern section feature rugged gorges and low escarpments, providing topographic variety to the otherwise flat surrounding plains. The park protects two large ephemeral lakes, Lake Peery covering 5,026 hectares when flooded and the slightly smaller Lake Poloko, which are part of the Paroo Overflow lake system. These lakes fill on average once every five years and remain full for periods ranging from one to three years, creating a dynamic landscape that cycles between flooded wetland and dry lakebed. The landscape also includes extensive sand plains and dune fields, with the characteristic mulga-dominated vegetation growing on the intervening areas. When Lake Peery dries, it reveals the only location in New South Wales where Great Artesian Basin mound springs are visible directly within a lakebed, a truly unique geological feature.

The park lies within the Mulga Lands Bioregion, which extends from northwestern New South Wales into southwestern Queensland and supports distinctive vegetation communities adapted to arid conditions. The predominant vegetation is mulga tall shrubland, interspersed with Eremophila and Dodonaea open shrubland communities and black bluebush low open shrubland. The region's climate is arid with highly variable rainfall that leads to extended droughts interspersed with occasional flooding rains, creating challenging conditions for both plants and animals. The park supports 424 vascular plant species across 20 distinct vegetation communities, demonstrating surprisingly high biodiversity for an arid environment. Two threatened ecological communities are protected within the park: artesian mound springs and nelia woodland, both listed as endangered under New South Wales legislation. The wetlands depend on the highly variable flow regime of the Paroo River, the last unregulated river in the Murray-Darling Basin, and this natural flooding and drying cycle creates the habitat heterogeneity that supports the park's biodiversity.

The park supports a remarkable diversity of wildlife despite its arid setting, with the wetlands providing critical drought refuge when surrounding areas are dry. Mammals include prominent macropod species such as red kangaroo, eastern grey kangaroo, western grey kangaroo and euro, while several vulnerable bat species have been recorded including the yellow-bellied sheath-tailed bat, little pied bat and inland forest bat. The stripe-faced dunnart represents another vulnerable mammal species present. Reptile surveys have documented 44 species including the wedge-snout ctenotus and crowned gecko which are listed as vulnerable, along with lace monitor, shingleback, carpet python and mulga snake. The wetlands are particularly significant for waterbirds, with aerial surveys recording up to 35,900 birds comprising 42 species at Peery Lake during flood events. Five waterbird species listed under the NSW Threatened Species Conservation Act have been recorded, including freckled duck, blue-billed duck, brolga, painted snipe and black-tailed godwit. The lakes also provide important habitat for migratory shorebirds protected under international agreements.

Paroo-Darling National Park addresses a critical gap in Australia's protected area network, as the Mulga Lands Bioregion was previously underrepresented in the conservation reserve system. The park's Ramsar designation reflects its international significance as a wetland of importance, particularly for waterbirds. The protection of artesian mound springs is especially significant given they are considered the rarest landform in Australia and support species found nowhere else, including the endangered salt pipewort which occurs only at Lake Peery and one other location in New South Wales. The park faces multiple conservation challenges including introduced species such as rabbits, goats, feral pigs, foxes and cats that threaten native biodiversity, invasive weeds, and potential future regulation of Paroo River flows that could disrupt the natural flooding regime on which the wetlands depend. Climate change poses additional threats through predicted higher temperatures, altered rainfall patterns and increased fire frequency. Management focuses on controlling introduced species, maintaining appropriate fire regimes, and cooperation with the Paroo-Darling National Park Elders Council.

The park holds deep significance for the Paakantyi people, whose ancestors inhabited this landscape for thousands of years as evidenced by the hearth sites, stone tool scatters and scarred trees protected within the park. The artesian mound springs at Lake Peery are culturally important as they provided a secure and permanent source of freshwater and feature in local dreamtime stories. The park's formation and ongoing management recognizes this continuing connection through cooperation with the Paroo-Darling National Park Elders Council. The landscape also bears marks of more recent European history through the former pastoral properties that now form part of the park, though the conservation values have been prioritized over pastoral use following the government purchases that created the reserve.

The rare artesian mound springs visible in Lake Peery lakebed represent a geological wonder unique to this park and constitute the rarest landform in Australia. The dramatic transformation of the landscape when Lake Peery and Lake Poloko fill with water, attracting tens of thousands of waterbirds, offers one of Australia's most spectacular arid wetland displays. The Ramsar-listed Paroo River Wetlands provide internationally important habitat for migratory shorebirds under JAMBA, CAMBA and ROKAMBA agreements. The park protects the endangered salt pipewort, one of New South Wales's rarest vascular plants, found only at the Lake Peery mound springs. The Peery Hills offer rugged scenic contrast to the surrounding plains with their gorges and low escarpments.

The park's character changes dramatically with seasons and rainfall, making timing important for visitors seeking different experiences. The wetlands are most spectacular when the Paroo River flows and the lakes fill, typically occurring on average once every five years, transforming the normally dry landscape into a vibrant wetland alive with waterbirds. During dry periods the park offers a different but equally compelling experience, with the rare opportunity to walk on the dry lakebed and observe the mound springs that only become visible when water recedes. Summer temperatures are high, while winters are mild, and the park is accessed via dry weather roads which may be impassable after rain. The visitor centre at White Cliffs provides current conditions and recommendations.