Interpolated and extrapolated species accumulation curves versus number of individuals for the Machay and Naturetrek-Vizcaya Reserves. The black vertical line marks the number of individuals at which the richness of each are compared on each curve (this is the size of the smallest sample). At this sample size (n =11), the sample from Naturetrek-Viscaya would on the average have three species, while a sample of the same size from Machay would be expected to have five species.