Keo Seima Wildlife Sanctuary (previously named Seima Biodiversity Conservation Area from 2002 to 2009, and Seima Protection Forest from 2009 to 2016) covers close to 300,000 ha in the east of Cambodia. This protected area is home to a rich diversity of wildlife, forest types, landscapes, and indigenous communities. Supported by WCS since before its inception in 2002, it is the site of the Keo Seima REDD+ project, one of Cambodia’s largest and most successful conservation programs.