Roebuck Bay. 07/06/90; Western Australia; 55,000 ha; 18°07'S 122°16'E. A tropical, marine embayment of extensive intertidal flats, sand beaches, extensive mudflats supporting various species of mangroves, and grasslands above high tide mark. Northwestern Australia is the continent's most important region for waders, regularly supporting up to half a million birds. The bay regularly supports over 100,000 other waterbirds, with numbers being highest in the austral spring when migrant species breeding in the Palearctic stop to feed during migration. There is light recreational usage and a bird observatory. Ramsar site no. 479. Most recent RIS information: 1998.