Sites - Important Bird and Biodiversity Areas (IBAs)
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Cocos Island, Guam
Guam (to USA)
144o 38.93' East 13o 14.17' North
0 - 7m
Year of IBA assessment
Summary Cocos Island (Chamorro: Islan Dåno) is an island 1 mile (1.6 km) off the southern tip of the United States territory of Guam, located within the Merizo Barrier Reef, part of the municipality of Merizo. The island is uninhabited, 1,600 meters (5,200 ft) long in a southwest-northeast direction, but only between 200 m (660 ft) and 300 m (980 ft) wide, and has an area of 386,303 m2 (95.458 acres). It sits atop the southwestern coral reef rim of Cocos Lagoon. The west coast of the island is a day resort.
Key Biodiversity Green sea turtles nest on Cocos extensively, and it retains a reasonably robust coconut crab population, as well as several rare terrestrial lizards no longer found on Guam.
Virtually all the seabirds nesting around Guam are on Cocos Island. This comprises Common White Terns, Brown Noddies and Black Noddies. The numbers involved are only small, by global standards.