Table 1. Summary of measures.

Note that all measures prioritise evolutionary distinctiveness (‘ED’ above), and that all components are scaled such that their means are zero and standard deviations one unless stated. As discussed in the text, in the EDAM framework EDGE values could be called EDM _RL, although EDGE components are not scaled.

Measure	Formula	Prioritises
EDGE (EDM RL)	unscaled ln(ED) + Red List	Global threat
EDM	ln(ED) + range change	British threat
EDAM	ln(ED) + range change + precision of decrease	Range change and low precision of decrease
EDAM′	ln(ED) + reversed range change + precision of increase	Range change and low precision of increase
ED(AM)max	ln(ED) + max(range change, precision)	Greatest value of threat and accuracy of prediction