| lophuromys brevicaudus | Yes | species | eukaryota | rodents | species | 303927 | click here |
| loxia leucoptera | Yes | species | eukaryota | vertebrates | species | 96539 | click here |
| loxodonta africana | Yes | species | eukaryota | mammals | species | 9785 | click here |
| loxodonta cyclotis | Yes | species | eukaryota | mammals | species | 99490 | click here |
| lutreolina crassicaudata | Yes | species | eukaryota | mammals | species | 38620 | click here |
| lutzomyia caballeroi | Yes | species | eukaryota | invertebrates | species | 252634 | click here |
| lutzomyia evansi | Yes | species | eukaryota | invertebrates | species | 417437 | click here |
| lutzomyia longipalpis | Yes | species | eukaryota | invertebrates | species | 7200 | click here |
| lycalopex gymnocercus | Yes | species | eukaryota | mammals | species | 425201 | click here |
| lycalopex vetulus | Yes | species | eukaryota | mammals | species | 68734 | click here |
| lygaeus kalmii | Yes | species | eukaryota | invertebrates | species | 683892 | click here |
| lynx rufus | Yes | species | eukaryota | mammals | species | 61384 | click here |
| lyperosia | Yes | | | | | | click here |
| macaca fascicularis | Yes | species | eukaryota | primates | species | 9541 | click here |
| macaca mulatta | Yes | species | eukaryota | primates | species | 9544 | click here |
| macaca nemestrina | Yes | species | eukaryota | primates | species | 9545 | click here |
| macaca nigra | Yes | species | eukaryota | primates | species | 54600 | click here |
| macaca silenus | Yes | species | eukaryota | primates | species | 54601 | click here |
| macaca sp. | Yes | no rank | eukaryota | primates | species | 9549 | click here |
| macropus agilis | Yes | species | eukaryota | mammals | species | 9313 | click here |
| macropus giganteus | Yes | species | eukaryota | mammals | species | 9317 | click here |
| macropus giganteus giganteus | Yes | subspecies | eukaryota | mammals | subspecies | 39422 | click here |
| mammalia | Yes | | | mammals | class | 40674 | click here |
| mandrillus sphinx | Yes | species | eukaryota | primates | species | 9561 | click here |
| manorina melanocephala | Yes | species | eukaryota | vertebrates | species | 44314 | click here |
| marmosa | Yes | | | mammals | genus | 9269 | click here |
| marmosops incanus | Yes | species | eukaryota | mammals | species | 225404 | click here |
| martes zibellina | Yes | species | eukaryota | mammals | species | 36722 | click here |
| mastomys erythroleucus | Yes | species | eukaryota | rodents | species | 41268 | click here |
| mastomys natalensis | Yes | species | eukaryota | rodents | species | 10112 | click here |
| maxomys musschenbroekii | Yes | species | eukaryota | rodents | species | 907926 | click here |
| meccus pallidipennis | Yes | species | eukaryota | invertebrates | species | 30077 | click here |
| megaderma spasma | Yes | species | eukaryota | mammals | species | 9414 | click here |
| megaselia scalaris | Yes | species | eukaryota | invertebrates | species | 36166 | click here |
| melanogrammus aeglefinus | Yes | species | eukaryota | vertebrates | species | 8056 | click here |
| melanosuchus niger | Yes | species | eukaryota | vertebrates | species | 38656 | click here |
| meles meles | Yes | species | eukaryota | mammals | species | 9662 | click here |
| meliphaga lewinii | Yes | species | eukaryota | vertebrates | species | 390651 | click here |
| melophagus ovinus | Yes | species | eukaryota | invertebrates | species | 452749 | click here |
| melospiza lincolnii | Yes | species | eukaryota | vertebrates | species | 44396 | click here |
| mephitis mephitis | Yes | species | eukaryota | mammals | species | 30548 | click here |
| mepraia gajardoi | Yes | species | eukaryota | invertebrates | species | 722425 | click here |
| mepraia spinolai | Yes | species | eukaryota | invertebrates | species | 162383 | click here |
| mesocricetus auratus | Yes | species | eukaryota | rodents | species | 10036 | click here |
| metachirus | Yes | | | mammals | genus | 42724 | click here |
| metachirus nudicaudatus | Yes | species | eukaryota | mammals | species | 42725 | click here |
| metacnephia | Yes | | | invertebrates | genus | 61054 | click here |
| micoureus paraguayanus | Yes | species | eukaryota | mammals | species | 225729 | click here |
| microdon dimorphon | Yes | species | eukaryota | invertebrates | species | 115311 | click here |
| microlophus atacamensis | Yes | species | eukaryota | vertebrates | species | 211986 | click here |
| micronycteris | Yes | | | mammals | genus | 148056 | click here |
| micronycteris megalotis | Yes | species | eukaryota | mammals | species | 148066 | click here |
| micronycteris minuta | Yes | species | eukaryota | mammals | species | 148067 | click here |
| micropterus salmoides | Yes | species | eukaryota | vertebrates | species | 27706 | click here |
| microtriatoma trinidadensis | Yes | species | eukaryota | invertebrates | species | 741772 | click here |
| microtus agrestis | Yes | species | eukaryota | rodents | species | 29092 | click here |
| microtus montebelli | Yes | species | eukaryota | rodents | species | 79202 | click here |
| mimon crenulatum | Yes | species | eukaryota | mammals | species | 148071 | click here |
| miniopterus fuliginosus | Yes | species | eukaryota | mammals | species | 187007 | click here |
| miniopterus natalensis | Yes | species | eukaryota | mammals | species | 291302 | click here |
| miniopterus schreibersii | Yes | species | eukaryota | mammals | species | 9433 | click here |
| miopithecus talapoin | Yes | species | eukaryota | primates | species | 36231 | click here |
| molossus molossus | Yes | species | eukaryota | mammals | species | 27622 | click here |
| monodelphis | Yes | | | mammals | genus | 13615 | click here |
| monodelphis americana | Yes | species | eukaryota | mammals | species | 694061 | click here |
| monodelphis brevicaudata | Yes | species | eukaryota | mammals | species | 203680 | click here |
| monodelphis domestica | Yes | species | eukaryota | mammals | species | 13616 | click here |
| mops condylurus | Yes | species | eukaryota | mammals | species | 258863 | click here |
| mus mahomet | Yes | species | | | species | 1582499 | click here |
| mus minutoides | Yes | species | eukaryota | rodents | species | 10105 | click here |
| mus musculus | Yes | species | eukaryota | rodents | species | 10090 | click here |
| mus setulosus | Yes | species | eukaryota | rodents | species | 10102 | click here |
| mus triton | Yes | species | eukaryota | rodents | species | 473865 | click here |
| musca domestica | Yes | species | eukaryota | invertebrates | species | 7370 | click here |
| mustela putorius furo | Yes | subspecies | eukaryota | mammals | subspecies | 9669 | click here |
| myodes andersoni | Yes | species | eukaryota | rodents | species | 82466 | click here |
| myodes glareolus | Yes | species | eukaryota | rodents | species | 447135 | click here |
| myomyscus brockmani | Yes | species | eukaryota | rodents | species | 485437 | click here |
| myotis | Yes | | | mammals | genus | 9434 | click here |
| myotis albescens | Yes | species | eukaryota | mammals | species | 159322 | click here |
| myotis frater | Yes | species | eukaryota | mammals | species | 187012 | click here |
| myotis keaysi | Yes | species | eukaryota | mammals | species | 159327 | click here |
| myotis levis | Yes | species | eukaryota | mammals | species | 153285 | click here |
| myotis myotis | Yes | species | eukaryota | mammals | species | 51298 | click here |
| myotis mystacinus | Yes | species | eukaryota | mammals | species | 109479 | click here |
| myotis nigricans | Yes | species | eukaryota | mammals | species | 153286 | click here |
| myotis pequinius | Yes | species | eukaryota | mammals | species | 392004 | click here |
| myotis riparius | Yes | species | eukaryota | mammals | species | 124752 | click here |
| myotis ruber | Yes | species | eukaryota | mammals | species | 159333 | click here |
| myotis siligorensis | Yes | species | eukaryota | mammals | species | 258940 | click here |
| myotis sp. | Yes | species | | | species | 1911917 | click here |
| nandinia binotata | Yes | species | eukaryota | mammals | species | 71115 | click here |
| nanger granti | Yes | species | eukaryota | mammals | species | 27591 | click here |
| nasua narica | Yes | species | eukaryota | mammals | species | 352831 | click here |
| nasua nasua | Yes | species | eukaryota | mammals | species | 9651 | click here |
| nectarinia olivacea | Yes | species | eukaryota | vertebrates | species | 170863 | click here |
| neoromicia capensis | Yes | species | eukaryota | mammals | species | 110938 | click here |
| neotoma macrotis | Yes | species | eukaryota | rodents | species | 349162 | click here |
| neotoma micropus | Yes | species | eukaryota | rodents | species | 105150 | click here |
| neovison vison | Yes | species | eukaryota | mammals | species | 452646 | click here |