Factors tested as potential determinants of viral richness (References in Annexe 1).

*Viral richness is obtained from the number of individual bats that we have sampled combined with animals sampled as reported in published papers.**Foliage includes bats that roost in trees: main bough, under bark, within foliage, hollow branches, under exposed roots, deep in dense foliage and in tree trunks. Cave includes tunnels, cavities or crevices, abandoned mine shafts, roofs and basements of houses.***Average body weight, both sexes combined.