Table 1 Taxonomic comparisons of the 2919 highly threatened terrestrial vertebrates and the 1189 highly threatened terrestrial vertebrates on islands.

CR, critically endangered; EN, endangered.

Taxonomic classAll terrestrial vertebrates (11)All terrestrial vertebrates from islands
Total taxa (% of
described taxa)
# of CR and EN
(% of total)
Red List category
(% of total)
Total CR and EN
(% of total CR and EN)
Red List category
(% of total CR and EN)
CRENCREN
Amphibia6106 (24%)1255 (21%)498 (8%)757 (12%)319 (25%)109 (34%)210 (34%)
Reptilia4160 (17%)486 (12%)162 (4%)324 (8%)282 (58%)105 (58%)177 (37%)
Aves9538 (38%)566 (6%)187 (2%)379 (4%)296 (52%)119 (52%)177 (40%)
Mammalia5337 (21%)612 (11%)187 (4%)425 (8%)292 (48%)96 (48%)196 (33%)
Total25,1412919 (12%)1034 (4%)1885 (7%)1189 (41%)429 (36%)760 (64%)