Average number of vertebrate partners per plant (P), proportion of vertebrate partners that are threatened with extinction (T), and proportion of total vertebrate-mutualist plants at risk of losing all vertebrate partners (TP), by geographic region.

Geographic affinities are derived from the IUCN Red List; subregions of Asia and Africa were combined into continental estimates due to low sample size of available studies providing number of partners per plant. N = number of studies available for each geographic region. †Regions with notably high risk (>2%). Note: where only a single study was available, N = 1 and no variance calculation is possible. Such cases were omitted from discussion of high-risk regions. N/A = no studies available.