Key Biodiversity Ao Pattani is an important site for migratory shorebirds, and regularly supports greater than 20,000 congregatory waterbirds. A number of globally threatened waterbird species have been recorded at the site, although none is thought to regularly occur in significant numbers. There are recent records of the globally endangered Nordmann's Greenshank Tringa guttifer and Black-faced Spoonbill Platalea minor, as well as historical records of the globally vulnerable Spoon-billed Sandpiper Calidris pygmeus, including the highest count of this species to date in Thailand: 13 birds in 1984.