The Gulf of Mottama, also called the Gulf of Martaban, extends 53,510 acres between Kyaikto and Bilin townships, is an arm of the Andaman Sea in the southern part of Myanmar. The Gulf of Mottama is the fourth wetland in Myanmar to be designated a Ramsar site. The other three wetlands of international importance are the Moe Yun Gyi wetlands in Bago Region, Indawgyi Lake in Kachin State and the Meinmahla Kyun Wildlife Sanctuary in Ayeyarwady Region. According to the Ramsar organization, the Gulf of Mottama supports a large range of species, including up to 90,000 migratory water-birds. The site may be host to more than half of the remaining population of critically endangered Spoon-billed sandpipers.

For birding so call Spoon-billed Sandpiper Expectation at that area the season of November to March, migration season in Myanmar, some shore birds have been great chance to see.