In some stands, Yellow Box woodland has been found to host a multitude of fauna and plant species of conservation significance.

Bush Heritage Australia CEO Doug Humann said the woodland was discovered as part of its Ecological Outcomes Monitoring program, supported by the Macquarie Group Foundation and private donors.

"Discoveries of such significant conservation value highlights the importance of systematic surveying and monitoring, " he said.

"The Macquarie Group Foundation's support has provided the resources and capacity to establish this program, which now extends across most of our 31 reserves."

Yellow Box woodlands are currently listed as a Critically Endangered Ecological Community under the Environment Protection and Biodiversity Conservation Act, 1999. This community is poorly represented in conservation reserves, but also exists on Bush Heritage's Tarcutta Hills Reserve in NSW.

The discovery of the woodland requires urgent action by Bush Heritage Australia to protect this rare find and the species dependant on it. Hundreds of tonnes per hectare of dead and uncharred logs need to be protected, while the threat of foxes and feral cats is ongoing.

Bush Heritage reported on the discovery at their Annual Conservation Report launch event hosted by the Macquarie Group in Sydney and Melbourne.

The program monitors conservation improvements and has established 465 permanent monitoring sites across 21 properties, conducts annual bird surveys, baseline vegetation structure and soil surface assessments and small mammal surveys on several properties in Queensland and WA.