The Castlereagh Nature Reserve is a protected nature reserve located in the western suburbs of Sydney in New South Wales, Australia. The reserve is situated west of the central business district, approximately north-east of and located near the townships of and . In 1960, was reclaimed for use as a Child Welfare Training School, and in 1971, was reclaimed for the establishment of a liquid waste disposal facility. The boundary of the reserve is marked by The Northern Road to the west, by Llandilo Road to the east, rural properties to the south and by the Castlereagh Waste Management Centre to the north. The nature reserve was formerly Castlereagh State Forest and was managed as a production forest from 1917 to 1988, then as a demonstration forest from 1988 to 1995. Features Geology The Castlereagh Nature Reserve contains a geographically restricted substrate of Tertiary alluvials producing clays, sand, gravel and shales at depth. Parts of the reserve support Cumberland Plain Woodland vegetation. The nature reserve is between above sea level and is predominantly flat with broad, shallow depressions forming a sparse drainage network. Small, shallow lakes form after wet weather to the north of the reserve where gravels and other alluvials have been extracted when the reserve was a production forest. Flora Open forest occurs on clay soils and is dominated by broad-leaved ironbark Eucalyptus fibrosa sap. Fibrosa with occasional mugga ironbark Eucalyptus sideroxylon, thin-leaved stringybark Eucalyptus enugeniodes, woollybutt Eucalyptus longifolia and Scribbly Gum Eucalyptus sclerophylla. Threatened plant species found in the nature reserve include Dillwynia tenuifolia, Pultenea parviflora, Acacia bynoeana, dwarf casuarina Allocasuarina glareicola, nodding geebung Persoonia nutans and Micromyrtus minutiflora. The reserve is relatively free of significant weed infestations. A few slash pines Pinus elliotti are found in the northern section of the reserve from when of Castlereagh State Forest was used for trial plantings of pines in the 1920s and 1930s. Heavy harvesting of ironbark during the Second World War, illegal timber collection and numerous fires generally thinned the forest, resulting in no mature trees in some areas. Fauna The nature reserve is home to a diverse range of mammals including sugar gliders, Petaurus breviceps; brush-tailed possum, Trichosurus vulpecula; and eastern grey kangaroo, Macropus giganteus. The eastern brown snake, Pseudonaja textilis; red-bellied black snake, Psuedechris porphriacus; lace monitor, Varanus varius; and a number of frog species including the endangered green and golden bell frog, Litoria aurea; also