Three Hummock Island
Three Hummock Island is shown in the lower left on the map, in the Bass Strait between Tasmania and Victoria.
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 Three Hummock Island
Location of the Three Hummock Island in the Bass Strait
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| Etymology | Three prominent hills: North, Middle and South Hummock |
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| Geography | |
| Location | Bass Strait |
| Coordinates | 40°26′24″S 144°54′36″E / 40.44000°S 144.91000°ECoordinates: 40°26′24″S 144°54′36″E / 40.44000°S 144.91000°E |
| Archipelago | Hunter Group |
| Area | 70 km2 (27 sq mi) |
| Highest elevation | 237 m (778 ft) |
| Highest point | South Hummock |
| Administration | |
| State | Tasmania |
| Largest settlement | Chimney Corner |
| Additional information | |
| Official website | threehummockisland |
The Three Hummock Island, part of the Hunter Island Group, is a 70-square-kilometre (27 sq mi) granite island, located in the Bass Strait near King Island, lying off the north-west coast of Tasmania, Australia.
The island is named after its three most prominent hills, North, Middle and South Hummock, the latter being the highest with an elevation of 237 metres (778 ft) above mean sea level. Part of the island is a nature reserve, with the rest a pastoral lease where farming took place from the mid-1800s to at least the mid-1970s. The focus of human settlement on the island is the homestead at Chimney Corner at the westernmost point. There is an automated lighthouse at Cape Rochon in the north-east, as well as roads, three airstrips, fencing and a wharf. Seasonal muttonbirding occurs in March and April.
Much of the island is composed of dense scrub dominated by Leptospermum scoparium, Melaleuca ericifolia and Banksia marginata, while 25% of the area is covered by Eucalyptus nitida woodland.
The island forms part of the Hunter Island Group Important Bird Area. Breeding seabirds and shorebirds include little penguin, short-tailed shearwater, Pacific gull, pied oystercatcher, sooty oystercatcher and hooded plover. Mammals include the introduced eastern grey kangaroo, feral cat and house mouse. Feral sheep were recorded in a 1999 survey. Tiger snakes are also present.
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