Wongarbon Nature Reserve is 99 hectares and was reserved in September 1965 and is significant for its biological and landscape values.
- The reserve protects important remnant native vegetation in a highly cleared landscape.
- The reserve contains the White Box – Yellow Box – Blakely’s Red Gum Woodland ecological community, listed as endangered under the NSW Threatened Species Conservation Act 1995 (TSC Act) and as critically endangered under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act).
- The reserve supports two threatened woodland bird species: the grey-crowned babbler (Pomatostomus temporalis temporalis) and the brown treecreeper (Climacteris picumnus victoriae), both listed as vulnerable under the TSC Act.
- In 1978 Wongarbon Nature Reserve was listed on the Register of the National Estate (now the non-statutory Australian Heritage Database) because it is an important remnant of the original temperate woodland vegetation from the largely cleared central western slopes of New South Wales and thus forms a significant refuge for native animals.