Table 2. Spatial sampling evenness of the spatial sampling template datasets measured using Simpson evenness.

A value of one indicates perfectly even sampling (all grid squares containing the same number of records). Lower Simpson evenness values indicate more spatially uneven sampling.

Spatial sampling template	Simpson evenness value
No bias	1
Low bias (birds)	0.762
Median bias (butterflies)	0.126
Severe bias (moths)	0.021