The island lies 350 metres (1,150 ft) from the tip of Murramarang Point. It is 880 metres (2,890 ft) long, with a maximum width of 560 metres (1,840 ft), and rises to about 30 metres (98 ft) above sea level. Its shorelines are steep, rocky cliff faces with erosion gullies on the northern side. The gullies are both caused and used by the little penguins whose tracks and burrows cover most of the island.[3]
History
The island was sighted by Captain James Cook on 22 April 1770 during his first voyage to the South Pacific Ocean. Cook had planned to shelter HMSEndeavour between the unnamed island and mainland but was prevented by high seas.[4] Instead Endeavour continued its northward path along the coast, making her first Australian landfall a week later at Botany Bay.[4]
The island became infested with black rats in 1932 after a steamer, the Northern Firth, ran aground there. In 2005 the rats were eradicated after a poisoning campaign by the NSW National Parks & Wildlife Service.[5]