Nadgigomar Nature Reserve conserves examples of long unburnt and largely unmodified tablelands woodland communities which are rare or otherwise not well represented in the reserve system. These include areas of Frost Hollow Grassy Woodland, Southern Tablelands Flats Forest, and Yellow Box Dry Herb/Grass Woodland which is part of the endangered ecological community White Box Yellow Box Blakely’s Red Gum Woodland.
Nadgigomar Nature Reserve also contains populations of threatened native animal species and threatened and regionally rare plants.