In several hotspots there is species congruence insofar as high counts for endemic plants are matched by high counts for endemic vertebrates (Table 5). (For analysis of congruence in other areas, see refs 12 and 31.) This factor reinforces the conservation priority thesis, especially in those hotspots with the most endemic species (Table 3). There can also be high congruence in areas with lower species counts, for example, 80% in the Eastern Arc with 0.5% of plant species and 0.4% of vertebrate species.