to yield information important to the understanding of the natural history of the Hawkesbury Sandstone flora and fauna. The place possesses uncommon, rare or endangered aspects of the cultural or natural history of New South Wales. European/Asian heritage The Quarantine Station, as NSW's primary quarantine facility for 166 years, held a unique place in the State's history, and its remarkably well preserved set of quarantine structures, landscape features and inscriptions make it a place of great rarity. The functions it fulfilled are no longer used to control quarantinable diseases, and the North Head Quarantine Station has the best representative collection of quarantine related buildings, equipment and human memorabilia [in the form of the inscriptions] of any Australian quarantine station. The moveable heritage associated with the Station; [and comprehensively documented by the NPWS] is of great cultural significance; particularly in situ within the Station. The Station is also significant in Australia's European and Asian history as being one of the few Australian sites taken into conservation ownership and management directly after its original function and use had been ended. Natural heritage Three species, one subspecies and populations of two other species are listed in schedules of the Threatened Species Conservation Act 1995. These species are the Little Penguin, Eudyptula minor (Schedule 1, endangered population, Manly); Long-nosed Bandicoot, Perameles nasuta (Schedule 1, endangered population North Head); the Sunshine Wattle, Acacia terminalis ssp terminalis (Schedule 1, endangered); Camfields Stringybark, Eucalyptus camfieldii (Schedule 2, vulnerable); the Powerful Owl, Ninox strenua (Schedule 2, vulnerable); and the Red-crowned Toadlet, Pseudophryne australis (Schedule 2, vulnerable). In addition to the threatened plant species there are over 450 other species of vascular plants and ferns representing 109 plant families. This level of genetic diversity if scientifically interesting and aesthetically pleasing. The endangered population of Little Penguin is significant as the only population of this species which breeds on the mainland of NSW. Thecharacteristics which have enabled this population to persist in one of the busiest commercial harbours in the world are interesting for scientific study. The endangered population of Long-nosed Bandicoot is also scientifically interesting as a remnant population of a species which was formerly common and widespread in the Sydney region. The few remaining trees of Camfields Stringybark are a significant component of the entire genetic resource of this vulnerable species. The place is important in demonstrating the principal characteristics of a class of cultural or natural places/environments