Table 1. Numbers of species used in the Table 2 calculations of “highly conservative” and “conservative” modern extinction rates based on the IUCN Red List (17).
Vertebrate taxon | No. of species, IUCN 2014.3 | ||||
Highly conservative rates (EX) |
Conservative rates (EX + EW + PE) |
No. of species evaluated by IUCN |
|||
Since 1500 | Since 1900 | Since 1500 | Since 1900 | ||
Vertebrates | 338 | 198 | 617 | 477 | 59% (39,223) |
Mammals | 77 | 35 | 111 | 69 | 100% (5,513) |
Birds | 140 | 57 | 163 | 80 | 100% (10,425) |
Reptiles | 21 | 8 | 37 | 24 | 44% (4,414) |
Amphibians | 34 | 32 | 148 | 146 | 88% (6,414) |
Fishes | 66 | 66 | 158 | 158 | 38% (12,457) |