Table 1.

Network statistics

Metric	Bat network	Rodent network	P‐valuea
Number of host species	143	196
Number of viruses	110	185
Number of viruses per host species	2.66	2.49
Number of host species per virus	3.8	2.71
Number of links	1074	1227	< 0.0001
Mean degree	15.0	12.5	< 0.0001
Mean weighted degree	20.1	15.2	< 0.0001
Mean weighted degree adjustedb	47.4	34.0	< 0.0001
Transitivity	0.61	0.54	< 0.0001; < 0.0001
Degree assortativity	0.10	−0.06	0.0002; 0.9766
Connectance	0.0525	0.0319	< 0.0001
q connectancec	0.1575	0.1147	< 0.0001
q connectance adjustedd	0.1639	0.1215	< 0.0001
q connectance Jaccarde	0.1173	0.0741	< 0.0001

^a P‐values give significance of difference between bat and rodent networks based on random permutations of the networks, except for transitivity and assortativity, which have two P‐values each for the bat and rodent networks, respectively, that indicate significance of difference from a random network (see Supplementary Methods in the Supporting Information).

^bMean weighted degree with weights adjusted according to sampling intensity (see Methods).

^cQuantitative connectance, which takes into account edge weights.

^dQuantitative connectance, with weights adjusted according to sampling intensity.

^eQuantitative connectance, where the weights are the proportion of viruses shared rather than the absolute number (see Methods).

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