| abrornis inornata | Yes | species | eukaryota | vertebrates | species | 56436 | click here |
| accipiter cooperii | Yes | species | eukaryota | vertebrates | species | 261198 | click here |
| accipiter gentilis | Yes | species | eukaryota | vertebrates | species | 8957 | click here |
| accipiter gentilis schvedowi | Yes | subspecies | eukaryota | vertebrates | subspecies | 258924 | click here |
| accipiter nisus | Yes | species | eukaryota | vertebrates | species | 211598 | click here |
| accipiter trivirgatus | Yes | species | eukaryota | vertebrates | species | 210844 | click here |
| acinonyx jubatus | Yes | species | eukaryota | mammals | species | 32536 | click here |
| acridotheres grandis | Yes | species | eukaryota | vertebrates | species | 451384 | click here |
| acridotheres tristis | Yes | species | eukaryota | vertebrates | species | 279927 | click here |
| acrocephalus arundinaceus | Yes | species | eukaryota | vertebrates | species | 39621 | click here |
| acrocephalus schoenobaenus | Yes | species | eukaryota | vertebrates | species | 52609 | click here |
| actitis hypoleucos | Yes | species | eukaryota | vertebrates | species | 320702 | click here |
| aechmophorus occidentalis | Yes | species | eukaryota | vertebrates | species | 57236 | click here |
| aedes aegypti | Yes | species | eukaryota | invertebrates | species | 7159 | click here |
| aedes sp. | Yes | no rank | eukaryota | invertebrates | species | 37951 | click here |
| aegithina tiphia | Yes | species | eukaryota | vertebrates | species | 175021 | click here |
| aegypius monachus | Yes | species | eukaryota | vertebrates | species | 8959 | click here |
| agropsar sturninus | Yes | species | | | species | 2675479 | click here |
| ailuropoda melanoleuca | Yes | species | eukaryota | mammals | species | 9646 | click here |
| ailurus fulgens | Yes | species | eukaryota | mammals | species | 9649 | click here |
| aix galericulata | Yes | species | eukaryota | vertebrates | species | 8832 | click here |
| aix sponsa | Yes | species | eukaryota | vertebrates | species | 8833 | click here |
| alca torda | Yes | species | eukaryota | vertebrates | species | 28689 | click here |
| alcippe grotei | Yes | species | eukaryota | vertebrates | species | 204884 | click here |
| alectoris chukar | Yes | species | eukaryota | vertebrates | species | 9078 | click here |
| alectoris graeca | Yes | species | eukaryota | vertebrates | species | 40178 | click here |
| alectoris rufa | Yes | species | eukaryota | vertebrates | species | 9079 | click here |
| alophoixus pallidus | Yes | species | eukaryota | vertebrates | species | 182879 | click here |
| alopochen aegyptiacus | Yes | species | eukaryota | vertebrates | species | 30382 | click here |
| amazona aestiva | Yes | species | eukaryota | vertebrates | species | 12930 | click here |
| amazona albifrons | Yes | species | eukaryota | vertebrates | species | 241569 | click here |
| amazona autumnalis | Yes | species | eukaryota | vertebrates | species | 151759 | click here |
| amazona autumnalis autumnalis | Yes | subspecies | eukaryota | vertebrates | subspecies | 244067 | click here |
| amazona brasiliensis | Yes | species | eukaryota | vertebrates | species | 244070 | click here |
| amazona oratrix | Yes | species | eukaryota | vertebrates | species | 152276 | click here |
| amblyomma americanum | Yes | species | eukaryota | invertebrates | species | 6943 | click here |
| amblyomma cajennense | Yes | species | eukaryota | invertebrates | species | 34607 | click here |
| amblyomma gemma | Yes | species | | invertebrates | species | 492567 | click here |
| amblyomma hebraeum | Yes | species | eukaryota | invertebrates | species | 34608 | click here |
| amblyomma lepidum | Yes | species | | invertebrates | species | 492568 | click here |
| amblyomma testudinarium | Yes | species | eukaryota | invertebrates | species | 375577 | click here |
| amblyomma variegatum | Yes | species | eukaryota | invertebrates | species | 34610 | click here |
| anas | Yes | | | vertebrates | genus | 8835 | click here |
| anas acuta | Yes | species | eukaryota | vertebrates | species | 28680 | click here |
| anas capensis | Yes | species | eukaryota | vertebrates | species | 8837 | click here |
| anas carolinensis | Yes | species | eukaryota | vertebrates | species | 75836 | click here |
| anas castanea | Yes | species | eukaryota | vertebrates | species | 45631 | click here |
| anas clypeata | Yes | species | eukaryota | vertebrates | species | 75838 | click here |
| anas crecca | Yes | species | eukaryota | vertebrates | species | 75839 | click here |
| anas cyanoptera | Yes | species | eukaryota | vertebrates | species | 75840 | click here |
| anas diazi | Yes | species | eukaryota | vertebrates | species | 75841 | click here |
| anas discors | Yes | species | eukaryota | vertebrates | species | 75842 | click here |
| anas erythrorhyncha | Yes | species | eukaryota | vertebrates | species | 75843 | click here |
| anas flavirostris | Yes | species | eukaryota | vertebrates | species | 75845 | click here |
| anas formosa | Yes | species | eukaryota | vertebrates | species | 56278 | click here |
| anas fulvigula | Yes | species | eukaryota | vertebrates | species | 75846 | click here |
| anas georgica | Yes | species | eukaryota | vertebrates | species | 75847 | click here |
| anas gracilis | Yes | species | eukaryota | vertebrates | species | 45630 | click here |
| anas platalea | Yes | species | eukaryota | vertebrates | species | 75853 | click here |
| anas platyrhynchos | Yes | species | eukaryota | vertebrates | species | 8839 | click here |
| anas platyrhynchos platyrhynchos | Yes | subspecies | eukaryota | vertebrates | subspecies | 8840 | click here |
| anas platyrhynchos x cairina moschata | Yes | no rank | eukaryota | vertebrates | species | 8841 | click here |
| anas platyrhynchos x rubripes | Yes | no rank | eukaryota | vertebrates | species | 539403 | click here |
| anas poecilorhyncha | Yes | species | eukaryota | vertebrates | species | 75854 | click here |
| anas querquedula | Yes | species | eukaryota | vertebrates | species | 75856 | click here |
| anas rubripes | Yes | species | eukaryota | vertebrates | species | 75857 | click here |
| anas smithii | Yes | species | eukaryota | vertebrates | species | 75859 | click here |
| anas sp. | Yes | no rank | eukaryota | vertebrates | species | 42806 | click here |
| anas superciliosa | Yes | species | eukaryota | vertebrates | species | 45632 | click here |
| anas undulata | Yes | species | eukaryota | vertebrates | species | 75862 | click here |
| anas versicolor | Yes | species | eukaryota | vertebrates | species | 75863 | click here |
| anas zonorhyncha | Yes | species | eukaryota | vertebrates | species | 75864 | click here |
| anastomus oscitans | Yes | species | | | species | 1706835 | click here |
| anatidae | Yes | | | vertebrates | family | 8830 | click here |
| anatinae | Yes | subfamily | | | subfamily | 2068716 | click here |
| anopheles coustani | Yes | species | eukaryota | invertebrates | species | 139045 | click here |
| anopheles gambiae | Yes | species | eukaryota | invertebrates | species | 7165 | click here |
| anopheles sinensis | Yes | species | eukaryota | invertebrates | species | 74873 | click here |
| anous tenuirostris | Yes | species | eukaryota | vertebrates | species | 297803 | click here |
| anser | Yes | | | vertebrates | genus | 8842 | click here |
| anser albifrons | Yes | species | eukaryota | vertebrates | species | 50365 | click here |
| anser albifrons albifrons | Yes | subspecies | eukaryota | vertebrates | subspecies | 132589 | click here |
| anser anser | Yes | species | eukaryota | vertebrates | species | 8843 | click here |
| anser anser domesticus | Yes | subspecies | eukaryota | vertebrates | subspecies | 8848 | click here |
| anser brachyrhynchus | Yes | species | eukaryota | vertebrates | species | 132585 | click here |
| anser caerulescens | Yes | species | eukaryota | vertebrates | species | 8849 | click here |
| anser caerulescens atlantica | Yes | subspecies | eukaryota | vertebrates | subspecies | 440516 | click here |
| anser caerulescens caerulescens | Yes | subspecies | eukaryota | vertebrates | subspecies | 70340 | click here |
| anser canagica | Yes | species | eukaryota | vertebrates | species | 107021 | click here |
| anser cygnoides | Yes | species | eukaryota | vertebrates | species | 8845 | click here |
| anser cygnoides domesticus | Yes | subspecies | eukaryota | vertebrates | subspecies | 381198 | click here |
| anser erythropus | Yes | species | eukaryota | vertebrates | species | 132586 | click here |
| anser fabalis | Yes | species | eukaryota | vertebrates | species | 132587 | click here |
| anser indicus | Yes | species | eukaryota | vertebrates | species | 8846 | click here |
| anser rossii | Yes | species | eukaryota | vertebrates | species | 56281 | click here |
| anser sp. | Yes | no rank | eukaryota | vertebrates | species | 8847 | click here |
| anseriformes | Yes | | | vertebrates | order | 8826 | click here |
| anthropoides virgo | Yes | species | eukaryota | vertebrates | species | 9111 | click here |
| antigone vipio | Yes | species | | | species | 2717088 | click here |
| antricola delacruzi | Yes | species | eukaryota | invertebrates | species | 480319 | click here |