Bunyip

Bunyip State Park encompasses approximately 14,675 hectares of wet and damp sclerophyll forest in the Strzelecki Ranges and Gembrook hills of South Gippsland, southeast of Melbourne. The park protects significant areas of mountain ash and messmate forest on the ranges south of the Latrobe Valley and includes the headwaters of several streams flowing south to the South Gippsland coast. The park takes its name from Bunyip Creek, which flows through its northern sections. Bunyip State Park is particularly notable for its populations of the critically endangered Leadbeater's possum, which requires mature mountain ash forest with abundant natural tree hollows and a dense wattle understorey. The park is an important conservation complement to the larger Yarra Ranges National Park to the north.

Bunyip State Park is nationally significant as one of the southernmost strongholds of the critically endangered Leadbeater's possum. The possum depends on old-growth mountain ash forest with abundant tree hollows for nesting and dense wattle understorey for food. Common wombats are abundant and easily observed throughout the park. Greater gliders, common brushtail possums, and mountain brushtail possums inhabit the mature eucalypt canopy. Swamp wallabies and eastern grey kangaroos are regular. Superb lyrebirds perform in the moist forest gullies. Powerful owls and sooty owls hunt the park's tall forest. Platypus inhabit the Bunyip River and its tributaries. The park provides important habitat connectivity between the Central Highlands conservation landscape and the Strzelecki Ranges.

The vegetation of Bunyip State Park is dominated by mountain ash and alpine ash forest in the wetter, higher elevation areas, transitioning to messmate and mixed sclerophyll forest on the drier slopes and ridges. Tree ferns — rough tree fern and soft tree fern — are abundant in the moist gullies, creating the classic Victorian wet forest atmosphere. Cool temperate rainforest of myrtle beech occurs in the most sheltered, moist gully positions. The wattle understorey, including silver wattle and manna wattle, is an ecologically critical component providing food resources for the Leadbeater's possum. The park contains several rare and threatened plant species associated with cool temperate rainforest and wet sclerophyll forest.

Bunyip State Park is underlain by Devonian granite and Silurian sedimentary and metamorphic rocks, similar to the geological basement of the broader Central Highlands and Strzelecki Ranges. The deep, moist soils of the gully environments are derived from the weathering of these parent rocks and are enriched by abundant organic matter from the highly productive forest. The Bunyip River and its tributaries have carved deep gullies into the highland terrain. The park's position on the southern edge of the Central Highlands represents a transition zone between the wetter uplands to the north and the Strzelecki Ranges landscape to the south.

Bunyip State Park experiences a cool temperate climate with high, reliable rainfall typical of the Central Highlands. Annual rainfall in the park ranges from approximately 900 to 1,400 millimetres, with the wettest areas in the higher portions of the park. Winters are cold with occasional snowfall on the highest terrain. Summers are cool compared with Melbourne, providing a pleasant escape from urban heat. Mist and low cloud are common in the forest, particularly in winter and spring. The park experienced significant bushfire damage in various events over the past century, including the 2009 Black Saturday fires which burned portions of the park.

The Bunurong people of the Kulin Nation have traditional connections to the South Gippsland ranges and surrounding coastal country. European exploration and settlement of the South Gippsland region occurred from the 1870s as settlers pushed through the dense Strzelecki forest to access the fertile dairying country to the south. Sawmilling operations in the mountain ash forests of the Bunyip Hills and adjacent ranges were significant during the late nineteenth and early twentieth centuries, extracting valuable timber for building and paper pulp. Much of the forest surrounding the present state park was heavily logged during this era.

Bunyip State Park was established from state forest reserves to protect significant areas of mountain ash and wet sclerophyll forest in the South Gippsland ranges. The park's boundaries have been adjusted over the years as understanding of the conservation values, particularly for Leadbeater's possum, has improved. Management by Parks Victoria focuses on maintaining the old-growth forest characteristics essential for Leadbeater's possum, controlling invasive species, and managing fire in a way that balances ecological requirements with community safety. The park's proximity to Melbourne makes it an important recreational destination as well as a conservation reserve.

Bunyip State Park offers forest walking experiences, particularly in the taller mountain ash and tree fern communities. The Billy's Creek area provides access to attractive forest with walking track options. The historic Lost Forest area contains old-growth mountain ash with veteran trees. Nocturnal spotlighting for Leadbeater's possum and greater gliders in suitable habitat is the most specialist wildlife attraction. The park's fern gully environments are evocative and atmospheric destinations for nature photography. Walking tracks through the tall ash forest with its cathedral-like atmosphere of towering straight trunks and lush understorey provide a distinctive Victorian forest experience.

Bunyip State Park has limited visitor infrastructure. Access is via unsealed roads from Gembrook and Neerim South on the park's northern and western margins. The park is approximately 80 kilometres from Melbourne via the South Eastern Freeway and Gembrook Road. The towns of Gembrook and Drouin provide the nearest visitor services. Walking tracks and picnic areas are provided at key access points. Four-wheel drive vehicles are recommended for roads within the park, particularly after rainfall. No formal campground exists within the park boundary.

The conservation of Leadbeater's possum is the paramount priority at Bunyip State Park. The possum requires specific old-growth forest attributes — abundant large-diameter hollow-bearing trees and dense wattle understorey — that take over 150 years to develop. The management of fire in mountain ash forest is a critical and complex challenge: too frequent fire prevents the development of old-growth characteristics, while the absence of fire can reduce wattle density. Climate change is expected to increase the frequency and intensity of fire in the mountain ash zone, potentially preventing forest recovery between fires. Invasive sambar deer cause significant damage to the understorey and are subject to ongoing management. Control of invasive weeds and feral predators complements the broader conservation effort.