There are three recognized subspecies of Eld’s deer and by the 1990s, one subspecies (Rucervus eldii eldii) was confined to a single wetland in India, a second (Rucervuseldii siamensis) was extirpated from Thailand and Vietnam with scattered reports in Lao PDR and Cambodia, and the third (Rucervus eldii thamin) was extirpated from Thailand, with isolated populations still occurring in Myanmar. The wild populations of R. eldii siamensis in eastern Cambodia are the largest for that subspecies. The largest remaining populations of R. eldii thamin are in Myanmar, and regional estimates estimate >90% of these animals reside along a crescent of forests between the Central Dry Zone and the Chin Hills to the west.