Table 2. Relative frequency (RF), relative abundance index (RAI), and the environmental factors affecting elephants in camera trap stations in the Phu Khieo Wildlife Sanctuary between 2016 and 2019.

Environmental factor	Present		Trap-night (Nights)	Encounter rate	RAI
	Number	%
Total camera trap station	149	100	6,896	4,319	62.6
Relative frequency (RF)	49	32.9
Forest
Dry evergreen forest	41	83.7
Mixed deciduous forest	7	14.3
Pine forest	0	0
Dry dipterocarp forest	1	2
Secondary forest	0	0
Total	49	100
Elevation (m)
200–400	2	4.1
400–700	5	10.2
700–900	29	59.2
900–1,100	7	14.3
1,100–1,300	6	12.2
Total	49	100
Slope (%)
0–20	27	55.1
20–40	10	20.4
40–60	8	16.3
60–80	4	8.2
Total	49	100