Holey Plains

Holey Plains State Park encompasses approximately 28,400 hectares of coastal heath and heathland on the Gippsland coastal plain south of Sale, in the South Gippsland region. The park takes its name from the numerous circular depressions or 'holes' created by the slumping of sandy soil into subsurface tunnels formed by previous tree root systems. The park protects extensive areas of lowland coastal heathland vegetation on ancient sand plains, providing habitat for a diverse range of plants and animals adapted to the infertile sandy soils and seasonal wetlands characteristic of the Gippsland coastal plain.

Holey Plains State Park supports wildlife characteristic of coastal heathland and sandplain environments. The ground parrot, a cryptic and threatened species of dense coastal heathland, inhabits the park and is the subject of ongoing monitoring programs. Southern brown bandicoots burrow through the heathland understorey. Common wombats, swamp wallabies, and echidnas are regularly encountered. The park's seasonal wetlands provide habitat for frogs including the southern brown tree frog and growling grass frog. Reptile diversity in the sandy soils is high. Birdlife includes honeyeaters, wrens, whistlers, and various raptors hunting the open heathland.

The vegetation of Holey Plains State Park is dominated by coastal heathland communities on the ancient Pleistocene sand deposits. Various heaths, banksias, hakeas, wattles, and native grasses form a diverse and seasonally spectacular heathland. Native orchids bloom prolifically in spring, including donkey orchids, spider orchids, and various greenhoods and sun orchids that take advantage of the nutrient-poor conditions that discourage competition from faster-growing plants. Swampy heath and sedge communities occupy the numerous seasonal wetland depressions. Pockets of heathy dry sclerophyll forest with stringybark and peppermint eucalypts add structural diversity. The park contains several rare and threatened plant species.

Holey Plains State Park is underlain by ancient coastal sand deposits of Quaternary age that were laid down as beach, dune, and coastal barrier systems during periods of higher sea level. The distinctive circular depressions, or 'holes', that give the park its name result from the collapse of subsurface voids created by decayed tree root systems. The porous sandy soils drain rapidly, creating the alternating wet and dry conditions that characterize the heathland. Beneath the sand, older Tertiary and Mesozoic rocks form the basement. Iron-rich soil horizons (ferricrete) at depth in the soil profile are characteristic of the ancient, deeply weathered coastal sands.

Holey Plains State Park experiences a cool temperate maritime climate moderated by its proximity to the Gippsland coast. Summers are warm to hot, with temperatures occasionally exceeding 35 degrees Celsius. Winters are cool and wet. Annual rainfall averages approximately 700 to 800 millimetres. The coastal heathland experiences very dry summer conditions despite reasonable annual rainfall, as the sandy soils drain quickly and summer evapotranspiration rates are high. This seasonal drought pattern is important for maintaining the structure of the heathland community.

The Gunaikurnai people have cultural connections to the Gippsland coastal plain, including the Holey Plains area. European pastoral settlement of Gippsland progressed rapidly from the 1840s, with the coastal plain being used for cattle grazing. Much of the heathland in Gippsland was subject to burning and grazing modification. The sandy soils of the area limited intensive agricultural development, allowing the heathland communities to survive in areas not converted to improved pasture.

Holey Plains State Park was established to protect the significant coastal heathland communities of the Gippsland coastal plain. The park is managed by Parks Victoria with a focus on maintaining the heathland vegetation and the threatened species it supports. Fire management is particularly important in heathland ecosystems, as the plant communities require periodic burning to maintain structure and diversity. The ground parrot population within the park is monitored as part of the broader Victorian ground parrot conservation program.

Holey Plains State Park offers informal walking and nature observation opportunities through the coastal heathland. The park is a good destination for wildflower enthusiasts in spring, when native orchids and heathland wildflowers are at their peak. The distinctive 'holes' that give the park its name are an interesting geological feature to observe. Birdwatching is rewarding, particularly for heathland specialists such as the ground parrot and southern emu-wren. The remote character of the park provides a peaceful natural experience.

Holey Plains State Park has minimal visitor facilities. The park is accessed via local roads from Sale or Longford. Sale provides comprehensive visitor services. No formal campground exists within the park. Four-wheel drive vehicles are recommended for accessing more remote areas. Parks Victoria provides information about the park's access routes and values.

Conservation management at Holey Plains focuses on maintaining the coastal heathland communities through appropriate fire management and control of invasive weeds and animals. The ground parrot population requires careful fire management to maintain its preferred habitat of dense, post-fire heathland regrowth. Fox and cat predation on ground-nesting birds and small mammals is managed through baiting programs. Invasive weeds including African lovegrass and various exotic shrubs are controlled. The park's conservation values are complemented by surrounding areas of coastal heathland on the Gippsland coastal plain.