[1] Before the property was purchased in 2005, the site was mostly freehold except for the 1,932 hectares (4,770 acres) of crown land of Yanga Nature Reserve.

[1][8] Climate in Yanga National Park is classified as warm persistently dry grassland based on a modified Köppen classification system.

[1][18] River red gum forest/woodland, black box woodland, lignum/nitre goosefoot (Chenopodium nitrariaceum) shrubland, and spike rush (Eleocharis spp.)

[1][30] This includes the southern bell frog (Litoria raniformis) which is listed as endangered under the Threatened Species Conservation Act.

[1] The southern bell frog was once widespread and abundant throughout south-eastern Australia,[31] but since the early 1980s its population and distribution have been reduced to a critical level.

[31][33] The major threat facing the condition of the wetlands in Yanga National Park is the alteration of natural flow regimes.

[34][35] Changes to natural flow regime over the past 30 years has reduced wetland availability,[29] has led to a decline in extent and condition of flood dependent vegetation, and has caused a reduction in flora and fauna that require specific flow regimes and water availability.

River regulation and the construction of levee banks to control floodwaters in the Nimmie-Caira system have reduced wetland availability by 60% (1975–1988) and caused total numbers of waterbirds to decline by 80% (1983–2000).

[29] Another major threat facing the condition of the wetlands in Yanga National Park is habitat loss and fragmentation.

The prolonged dry period in water-plant dominated areas (i.e. shallow temporary swamps) and lake beds increases the risk of exotic plant invasion.

The water has delivered benefits to wetland vegetation, black box woodland, river red gum forests and supported populations of the nationally threatened southern bell frog, and maintained nesting sites for many waterbird species.

Plans of management contain information on the natural environments, Aboriginal heritage, history, and recreational opportunities in a park.

There are two ecological communities within Yanga National Park which are listed as endangered under the New South Wales Threatened Species Conservation Act (1995), Myall woodland and an aquatic ecological community in the natural drainage system of the lower Murray River catchment.

The community consists of low woodland, with a tree layer of mostly weeping Myall or boree (Acacia pendula) as the dominant species.

[18][42] In the past land clearing and overgrazing by feral and domestic animals were the major threats to this ecological community within Yanga National Park.

Since the purchase of the property in 2005, the threat of further land clearing has been diminished, however grazing by feral and domestic animals such as kangaroos and rabbits still poses a risk to the community.

[1][29] Despite studies indicating that waterbird numbers have declined in this area,[29] throughout Australia,[43][44][45][46] and worldwide, the Lowbidgee floodplain and Yanga National Park still remains a significant breeding, feeding and nestling habitat contributing to sustaining the waterbird population, especially in inland Australia.

[1][10][35] Thirteen threatened plant species are known or predicted to occur in the lower Murrumbidgee region, such as lanky buttons (Leptorhynchos orientalis) and silky swainson-pea (Swainsona sericea).