|Cause of Change||Definite||Probable||Possible||Speculative|
|Data Category||Known Range||Possible Range||Total Range|
|Cause of||Survey Details2||Number of Elephants||Area||Map Location|
|Input Zone||Change1||Type||Reliab.||Year||Estimate||95% C.L.||Source||PFS3||(km²)||Lon.||Lat.|
|Monte Alén National Park||-||OG3||E||2002||300||S. Engonga, pers. comm., 2002||2||800||10.2E||1.6N|
|Montes Mitra Sector, Monte Alén National Park||NP||DC3||D||2004||700||330*||Puit & Ghiurghi, 2007||2||1,200||10.0E||1.4N|
* Range of informed guess
1Key to Causes of Change (only tracked since 2007): DA: Different Area; DD: Data Degraded; DT: Different Technique; NA: New Analysis; NG: New Guess; NP: New population; PL: Population Lost; RS: Repeat Survey (RS ́ denotes a repeat survey that is not statistically comparable for reasons such as different season); –––: No Change
2Key to Survey Types: AC: Aerial Count, not specified; AS: Aerial Sample Count; AT: Aerial Total Count; DC: Dung Count; EX: Extrapolation from GIS; GD: Genetic Dung Count; GS: Ground Sample Count; GT: Ground Total Count; IG: Informed Guess; IR: Individual Registration; OG: Other Guess. Survey Type is followed by an indicator of survey quality, ranked from 1 to 3 (best to worst). Survey Reliability is keyed A-E (best to worst) as outlined in this table.
3PFS: Priority for Future Surveys, ranked from 1 to 5 (highest to lowest). Based on the precision of estimates and the proportion of national range accounted for by the site in question, PFS is a measure of the importance and urgency for future population surveys. All areas of unassessed range have a priority of 1. See Introduction for details on how the PFS is derived.