Table 1.

Diagnostic tests for the optimisation of a GLM, explaining species presence–absence for a 10 km grid square (centroid), based on the density of confirmed species occurrences at contrasting-scales within the surrounding landscape (cf. electronic supplementary material, appendix S1). (AIC, Akaike information criterion.)

scale of analysis (size of buffer; km)	model diagnostics		k-fold cross-validation
	AIC	χ2-p	AUC	AUC threshold
10	54.56	<0.0001	0.957 ± 0.016	0.45
20	63.54	<0.0001	0.950 ± 0.016	0.43
30	56.94	<0.0001	0.959 ± 0.012	0.41
40	55.76	<0.0001	0.958 ± 0.013	0.35
50	57.313	<0.0001	0.958 ± 0.013	0.38