 The park contains the largest and most intact remnants of Cumberland Plain native plant and animal communities which once dominated Western Sydney.As such it offers a living snapshot of the early natural history of Western Sydney and the State.The state heritage significance of the Scheyville National Park is enhanced through its close association with a number of people important to the history and development of the colony and later State and Nation such as Governor Phillip King, William Francis Schey, Sir John Overall, Brigadier Ian Geddes, Tim Fischer and Jeff Kennet.