| acacia baileyana | Yes | species | eukaryota | plants | species | 383632 | click here |
| acacia cyclops | Yes | species | | | species | 546665 | click here |
| acacia dealbata | Yes | species | eukaryota | plants | species | 205042 | click here |
| acacia floribunda | Yes | species | eukaryota | plants | species | 866001 | click here |
| acacia irrorata | Yes | species | eukaryota | plants | species | 383645 | click here |
| acacia longifolia subsp. sophorae | Yes | subspecies | eukaryota | plants | subspecies | 866011 | click here |
| acacia maidenii | Yes | species | eukaryota | plants | species | 795978 | click here |
| acacia mearnsii | Yes | species | eukaryota | plants | species | 139012 | click here |
| acacia melanoxylon | Yes | species | eukaryota | plants | species | 138028 | click here |
| acacia paradoxa | Yes | species | eukaryota | plants | species | 139014 | click here |
| acacia retinodes | Yes | species | | | species | 1050817 | click here |
| acacia verticillata | Yes | species | eukaryota | plants | species | 139017 | click here |
| acari | Yes | | | invertebrates | subclass | 6933 | click here |
| accipiter cooperii | Yes | species | eukaryota | vertebrates | species | 261198 | click here |
| accipiter gentilis | Yes | species | eukaryota | vertebrates | species | 8957 | click here |
| accipiter nisus | Yes | species | eukaryota | vertebrates | species | 211598 | click here |
| accipiter striatus | Yes | species | eukaryota | vertebrates | species | 56330 | click here |
| acer pseudoplatanus | Yes | species | eukaryota | plants | species | 4026 | click here |
| achillea millefolium | Yes | species | eukaryota | plants | species | 13329 | click here |
| achillea ptarmica | Yes | species | eukaryota | plants | species | 133233 | click here |
| acridotheres tristis | Yes | species | eukaryota | vertebrates | species | 279927 | click here |
| acrocephalus arundinaceus | Yes | species | eukaryota | vertebrates | species | 39621 | click here |
| acrocephalus orientalis | Yes | species | eukaryota | vertebrates | species | 68483 | click here |
| acrocephalus schoenobaenus | Yes | species | eukaryota | vertebrates | species | 52609 | click here |
| actinidia polygama | Yes | species | eukaryota | plants | species | 64480 | click here |
| aepyceros melampus | Yes | species | eukaryota | mammals | species | 9897 | click here |
| aerodramus | Yes | | | vertebrates | genus | 46474 | click here |
| agaricus bisporus | Yes | species | eukaryota | plants | species | 5341 | click here |
| ailuropoda melanoleuca | Yes | species | eukaryota | mammals | species | 9646 | click here |
| alces americanus | Yes | species | eukaryota | mammals | species | 999462 | click here |
| alectoris graeca | Yes | species | eukaryota | vertebrates | species | 40178 | click here |
| alectoris rufa | Yes | species | eukaryota | vertebrates | species | 9079 | click here |
| allium ampeloprasum | Yes | species | eukaryota | plants | species | 4681 | click here |
| allium fistulosum | Yes | species | eukaryota | plants | species | 35875 | click here |
| allium tuberosum | Yes | species | eukaryota | plants | species | 4683 | click here |
| alouatta caraya | Yes | species | eukaryota | primates | species | 9502 | click here |
| alouatta guariba | Yes | species | eukaryota | primates | species | 182256 | click here |
| alouatta seniculus | Yes | species | eukaryota | primates | species | 9503 | click here |
| alpinia intermedia | Yes | species | eukaryota | plants | species | 105673 | click here |
| alstroemeria sp. | Yes | no rank | eukaryota | plants | species | 59035 | click here |
| amanita citrina | Yes | species | eukaryota | plants | species | 67700 | click here |
| amanita muscaria | Yes | species | eukaryota | plants | species | 41956 | click here |
| ammotragus lervia | Yes | species | eukaryota | mammals | species | 9899 | click here |
| ampelopsis glandulosa var. brevipedunculata | Yes | varietas | eukaryota | plants | varietas | 178805 | click here |
| ampulloclitocybe clavipes | Yes | species | eukaryota | plants | species | 56467 | click here |
| anas platyrhynchos | Yes | species | eukaryota | vertebrates | species | 8839 | click here |
| anethum foeniculum | Yes | species | | | species | 2849586 | click here |
| angelica | Yes | | | plants | genus | 40948 | click here |
| angelica sachalinensis | Yes | species | eukaryota | plants | species | 54702 | click here |
| angelica ursina | Yes | species | eukaryota | plants | species | 357859 | click here |
| anhinga anhinga | Yes | species | eukaryota | vertebrates | species | 56067 | click here |
| anolis sagrei | Yes | species | eukaryota | vertebrates | species | 38937 | click here |
| anser albifrons | Yes | species | eukaryota | vertebrates | species | 50365 | click here |
| anser anser | Yes | species | eukaryota | vertebrates | species | 8843 | click here |
| anthemis | Yes | | | plants | genus | 99027 | click here |
| anthemis bornmuelleri | Yes | species | eukaryota | plants | species | 589721 | click here |
| anthemis rascheyana | Yes | species | eukaryota | plants | species | 589782 | click here |
| anthornis melanura | Yes | species | eukaryota | vertebrates | species | 698975 | click here |
| antidorcas marsupialis | Yes | species | eukaryota | mammals | species | 59523 | click here |
| antigone vipio | Yes | species | | | species | 2717088 | click here |
| antilocapra americana | Yes | species | eukaryota | mammals | species | 9891 | click here |
| aotus azarai | Yes | species | eukaryota | primates | species | 30591 | click here |
| aotus griseimembra | Yes | species | eukaryota | primates | species | 292213 | click here |
| aotus lemurinus | Yes | species | eukaryota | primates | species | 43147 | click here |
| aotus nancymaae | Yes | species | eukaryota | primates | species | 37293 | click here |
| aotus trivirgatus | Yes | species | eukaryota | primates | species | 9505 | click here |
| aotus vociferans | Yes | species | eukaryota | primates | species | 57176 | click here |
| aphelocoma californica | Yes | species | eukaryota | vertebrates | species | 142466 | click here |
| aphelocoma coerulescens | Yes | species | eukaryota | vertebrates | species | 39617 | click here |
| aphelocoma insularis | Yes | species | eukaryota | vertebrates | species | 247969 | click here |
| aphididae | Yes | | | invertebrates | family | 27482 | click here |
| apodemus agrarius | Yes | species | eukaryota | rodents | species | 39030 | click here |
| apodemus flavicollis | Yes | species | eukaryota | rodents | species | 54292 | click here |
| apteryx australis | Yes | species | eukaryota | vertebrates | species | 8822 | click here |
| apteryx haastii | Yes | species | eukaryota | vertebrates | species | 8823 | click here |
| aquila chrysaetos | Yes | species | eukaryota | vertebrates | species | 8962 | click here |
| aquilegia vulgaris | Yes | species | eukaryota | plants | species | 3451 | click here |
| aramus guarauna | Yes | species | eukaryota | vertebrates | species | 54356 | click here |
| arctictis binturong | Yes | species | eukaryota | mammals | species | 94180 | click here |
| ardea alba | Yes | species | eukaryota | vertebrates | species | 110620 | click here |
| ardea cinerea | Yes | species | eukaryota | vertebrates | species | 30390 | click here |
| ardea cocoi | Yes | species | eukaryota | vertebrates | species | 399589 | click here |
| ardea herodias | Yes | species | eukaryota | vertebrates | species | 56072 | click here |
| ardea novaehollandiae | Yes | species | eukaryota | vertebrates | species | 390973 | click here |
| arenaria interpres | Yes | species | eukaryota | vertebrates | species | 54971 | click here |
| armillaria borealis | Yes | species | eukaryota | plants | species | 47425 | click here |
| artemisia arborescens | Yes | species | eukaryota | plants | species | 72386 | click here |
| artemisia montana | Yes | species | eukaryota | plants | species | 669134 | click here |
| artemisia princeps | Yes | species | eukaryota | plants | species | 223870 | click here |
| artemisia vulgaris | Yes | species | eukaryota | plants | species | 4220 | click here |
| artibeus jamaicensis | Yes | species | eukaryota | mammals | species | 9417 | click here |
| artibeus lituratus | Yes | species | eukaryota | mammals | species | 27634 | click here |
| arum maculatum | Yes | species | eukaryota | plants | species | 4458 | click here |
| arundo donax | Yes | species | eukaryota | plants | species | 35708 | click here |
| arvicanthis niloticus | Yes | species | eukaryota | rodents | species | 61156 | click here |
| asio otus | Yes | species | eukaryota | vertebrates | species | 111810 | click here |
| aster scaber | Yes | species | eukaryota | plants | species | 385370 | click here |
| asteraceae | Yes | | | plants | family | 4210 | click here |
| athene noctua | Yes | species | eukaryota | vertebrates | species | 126797 | click here |
| atherurus africanus | Yes | species | eukaryota | rodents | species | 192881 | click here |