. . "The marsh grassbird (Locustella pryeri), also known as the Japanese swamp warbler, is a species of Old World warbler in the Locustellidae family. It is found in China, Japan, South Korea, Mongolia, and Russia.Its natural habitat is swamps. It is threatened by habitat loss."@en . . . "IUCN3.1" . "Marsh grassbird"@en . . . "Megalurus pryeri" . "NT" . . . .