| odocoileus hemionus | Yes | species | eukaryota | mammals | species | 9872 | click here |
| odocoileus virginianus | Yes | species | eukaryota | mammals | species | 9874 | click here |
| odocoileus virginianus clavium | Yes | subspecies | | | subspecies | 1844112 | click here |
| oenothera biennis | Yes | species | eukaryota | plants | species | 3942 | click here |
| oligonychus ununguis | Yes | species | eukaryota | invertebrates | species | 50021 | click here |
| oncorhynchus clarkii | Yes | species | eukaryota | vertebrates | species | 30962 | click here |
| oncorhynchus kisutch | Yes | species | eukaryota | vertebrates | species | 8019 | click here |
| oncorhynchus mykiss | Yes | species | eukaryota | vertebrates | species | 8022 | click here |
| oncorhynchus tshawytscha | Yes | species | eukaryota | vertebrates | species | 74940 | click here |
| orcinus orca | Yes | species | eukaryota | mammals | species | 9733 | click here |
| oreamnos americanus | Yes | species | eukaryota | mammals | species | 34873 | click here |
| oreochromis niloticus | Yes | species | eukaryota | vertebrates | species | 8128 | click here |
| oryctolagus cuniculus | Yes | species | eukaryota | mammals | species | 9986 | click here |
| oryx | Yes | | | mammals | genus | 9957 | click here |
| oryx beisa | Yes | species | eukaryota | mammals | species | 344753 | click here |
| oryx gazella | Yes | species | eukaryota | mammals | species | 9958 | click here |
| oryx leucoryx | Yes | species | eukaryota | mammals | species | 39411 | click here |
| oryza rufipogon | Yes | species | eukaryota | plants | species | 4529 | click here |
| oryza sativa | Yes | species | eukaryota | plants | species | 4530 | click here |
| osteoglossum bicirrhosum | Yes | species | eukaryota | vertebrates | species | 109271 | click here |
| otaria byronia | Yes | species | eukaryota | mammals | species | 161932 | click here |
| otariidae | Yes | | | mammals | family | 9702 | click here |
| otidiphaps nobilis | Yes | species | eukaryota | vertebrates | species | 187130 | click here |
| otus scops | Yes | species | eukaryota | vertebrates | species | 126827 | click here |
| ovis | Yes | | | mammals | genus | 9935 | click here |
| ovis aries | Yes | species | eukaryota | mammals | species | 9940 | click here |
| ovis aries musimon | Yes | subspecies | eukaryota | mammals | subspecies | 9938 | click here |
| ovis canadensis | Yes | species | eukaryota | mammals | species | 37174 | click here |
| ovis canadensis canadensis | Yes | subspecies | eukaryota | mammals | subspecies | 112262 | click here |
| ozotoceros bezoarticus | Yes | species | eukaryota | mammals | species | 63824 | click here |
| paeonia ostii | Yes | species | eukaryota | plants | species | 459177 | click here |
| paguma larvata | Yes | species | eukaryota | mammals | species | 9675 | click here |
| pan paniscus | Yes | species | eukaryota | primates | species | 9597 | click here |
| pan troglodytes | Yes | species | eukaryota | primates | species | 9598 | click here |
| pan troglodytes schweinfurthii | Yes | subspecies | eukaryota | primates | subspecies | 37010 | click here |
| panthera leo | Yes | species | eukaryota | mammals | species | 9689 | click here |
| panthera pardus | Yes | species | eukaryota | mammals | species | 9691 | click here |
| panthera tigris | Yes | species | eukaryota | mammals | species | 9694 | click here |
| panthera tigris tigris | Yes | subspecies | eukaryota | mammals | subspecies | 74535 | click here |
| panthera uncia | Yes | species | eukaryota | mammals | species | 29064 | click here |
| papio anubis | Yes | species | eukaryota | primates | species | 9555 | click here |
| papio cynocephalus | Yes | species | eukaryota | primates | species | 9556 | click here |
| papio hamadryas | Yes | species | eukaryota | primates | species | 9557 | click here |
| papio papio | Yes | species | eukaryota | primates | species | 100937 | click here |
| papio ursinus | Yes | species | eukaryota | primates | species | 36229 | click here |
| paracheirodon innesi | Yes | species | eukaryota | vertebrates | species | 42492 | click here |
| paramesotriton hongkongensis | Yes | species | eukaryota | vertebrates | species | 164972 | click here |
| parapriacanthus ransonneti | Yes | species | eukaryota | vertebrates | species | 490339 | click here |
| parmelia omphalodes | Yes | species | eukaryota | plants | species | 164171 | click here |
| passalidae | Yes | | | invertebrates | family | 110046 | click here |
| passer domesticus | Yes | species | eukaryota | vertebrates | species | 48849 | click here |
| paullinia cupana | Yes | species | eukaryota | plants | species | 392747 | click here |
| pavo cristatus | Yes | species | eukaryota | vertebrates | species | 9049 | click here |
| pedicularis | Yes | | | plants | genus | 43174 | click here |
| pelargonium graveolens | Yes | species | eukaryota | plants | species | 73200 | click here |
| pelodiscus sinensis | Yes | species | eukaryota | vertebrates | species | 13735 | click here |
| pelophylax perezi | Yes | species | eukaryota | vertebrates | species | 8403 | click here |
| perdix perdix | Yes | species | eukaryota | vertebrates | species | 9052 | click here |
| perilla frutescens | Yes | species | eukaryota | plants | species | 48386 | click here |
| pethia conchonius | Yes | species | eukaryota | vertebrates | species | 27708 | click here |
| petromus typicus | Yes | species | eukaryota | rodents | species | 10183 | click here |
| petrosia ficiformis | Yes | species | eukaryota | invertebrates | species | 68564 | click here |
| phasianus colchicus | Yes | species | eukaryota | vertebrates | species | 9054 | click here |
| philodryas olfersii | Yes | species | eukaryota | vertebrates | species | 120305 | click here |
| phoca vitulina | Yes | species | eukaryota | mammals | species | 9720 | click here |
| phocidae | Yes | | | mammals | family | 9709 | click here |
| phoenicoparrus minor | Yes | species | eukaryota | vertebrates | species | 704175 | click here |
| phoenicopterus roseus | Yes | species | eukaryota | vertebrates | species | 435638 | click here |
| phoenix dactylifera | Yes | species | eukaryota | plants | species | 42345 | click here |
| piezodorus guildinii | Yes | species | | | species | 437484 | click here |
| pinna nobilis | Yes | species | eukaryota | invertebrates | species | 111169 | click here |
| pionus menstruus | Yes | species | eukaryota | vertebrates | species | 13214 | click here |
| pistacia lentiscus | Yes | species | eukaryota | plants | species | 371726 | click here |
| pithecia pithecia | Yes | species | eukaryota | primates | species | 43777 | click here |
| placidochromis | Yes | | | vertebrates | genus | 28821 | click here |
| placopecten magellanicus | Yes | species | eukaryota | invertebrates | species | 6577 | click here |
| platalea leucorodia | Yes | species | eukaryota | vertebrates | species | 257867 | click here |
| plecoglossus altivelis | Yes | species | eukaryota | vertebrates | species | 61084 | click here |
| plethodontohyla mihanika | Yes | species | eukaryota | vertebrates | species | 289221 | click here |
| plexauridae | Yes | | | invertebrates | family | 44191 | click here |
| poecile montanus | Yes | species | eukaryota | vertebrates | species | 48895 | click here |
| poecilia latipinna | Yes | species | eukaryota | vertebrates | species | 48699 | click here |
| poecilia reticulata | Yes | species | eukaryota | vertebrates | species | 8081 | click here |
| pogonatherum paniceum | Yes | species | eukaryota | plants | species | 167341 | click here |
| polygonum cuspidatum | Yes | species | eukaryota | plants | species | 83819 | click here |
| populus euphratica | Yes | species | eukaryota | plants | species | 75702 | click here |
| porifera | Yes | | | invertebrates | phylum | 6040 | click here |
| pristimantis cruentus | Yes | species | eukaryota | vertebrates | species | 326982 | click here |
| proboscidea | Yes | | | mammals | order | 9779 | click here |
| procavia capensis | Yes | species | eukaryota | mammals | species | 9813 | click here |
| procyon lotor | Yes | species | eukaryota | mammals | species | 9654 | click here |
| prosopium williamsoni | Yes | species | eukaryota | vertebrates | species | 89337 | click here |
| prunus | Yes | | | plants | genus | 3754 | click here |
| prunus avium | Yes | species | eukaryota | plants | species | 42229 | click here |
| psarocolius decumanus decumanus | Yes | subspecies | eukaryota | vertebrates | subspecies | 186239 | click here |
| pseudocaranx dentex | Yes | species | eukaryota | vertebrates | species | 349646 | click here |
| pseudorca crassidens | Yes | species | eukaryota | mammals | species | 82174 | click here |
| pseudotropheus sp. | Yes | no rank | eukaryota | vertebrates | species | 28823 | click here |
| pterophyllum scalare | Yes | species | eukaryota | vertebrates | species | 74131 | click here |
| puma concolor | Yes | species | eukaryota | mammals | species | 9696 | click here |