2006: surveys that collected DNA from elephant dung in Seima Protection Forest revealed a population of approximately 116 animals within the protected area — but not a single elephant was seen during the study.
1999: 500-1000 (Osborn and Vinton, 1999)
1995: 2 000 (Kemf and Jackson, 1995)
There is 121 captive elephants (Jack Highwood, 2011)
During the Pol Pot regime, some tame elephants reverted to a wild state. Very few wild elephants were captured during the period 1980 to 2000, according to local people in Mondulkiri.
In l999, Mondulkiri provincial DFW officials recorded 93 elephants, but by 2000 the number had declined to 83 elephants. These ten elephants lost between 1999 and 2000 were in fact sent to Siem Reap. According to the last double check conducted by Mondulkiri DFW in June to July 2001, 91 domesticated elephants were recorded. Others were possibly sold to Thailand and Viet Nam between l999 and 2000. During this period, six calf elephants were captured, ranging in age from 6 months to five years old, according to provincial DFW sources.(FAO)