Table 1. Regional variation in rainfall and primate species richness.

Region	N	Rainfall (mm)				Species richness
		Min	Max	Mean	SD	Mean	SD
Southeast Asia	390	881	4841	2364	743.7	5.7	2.19
Huxley West	364	881	4841	2369	758.6	5.9	1.98
Huxley East	26	1243	3238	2296	495.0	1.7	0.67
Mainland Southeast Asia	231	881	4841	2027	614.2	5.5	1.85
Borneo	83	1938	4083	3183	543.7	7.5	1.14
Sumatra	34	1724	3090	2458	322.0	6.9	0.91

N: number of sample points; SD: standard deviation.