| megalaima virens | Yes | species | eukaryota | vertebrates | species | 219518 | click here |
| megascops choliba | Yes | species | eukaryota | vertebrates | species | 507958 | click here |
| melaenornis edolioides | Yes | species | eukaryota | vertebrates | species | 701074 | click here |
| melanerpes aurifrons | Yes | species | eukaryota | vertebrates | species | 371916 | click here |
| melanerpes erythrocephalus | Yes | species | eukaryota | vertebrates | species | 279962 | click here |
| melanerpes striatus | Yes | species | eukaryota | vertebrates | species | 177297 | click here |
| melanocharis nigra | Yes | species | eukaryota | vertebrates | species | 175124 | click here |
| melanocharis versteri | Yes | species | eukaryota | vertebrates | species | 254552 | click here |
| melidectes belfordi | Yes | species | eukaryota | vertebrates | species | 43161 | click here |
| melidora macrorrhina | Yes | species | eukaryota | vertebrates | species | 342392 | click here |
| melilestes megarhynchus | Yes | species | eukaryota | vertebrates | species | 266365 | click here |
| meliphaga analoga | Yes | species | eukaryota | vertebrates | species | 175007 | click here |
| meliphaga lewinii | Yes | species | eukaryota | vertebrates | species | 390651 | click here |
| meliphaga montana | Yes | species | eukaryota | vertebrates | species | 390644 | click here |
| melipotes fumigatus | Yes | species | eukaryota | vertebrates | species | 108834 | click here |
| melopsittacus undulatus | Yes | species | eukaryota | vertebrates | species | 13146 | click here |
| melospiza georgiana | Yes | species | eukaryota | vertebrates | species | 44398 | click here |
| melospiza lincolnii | Yes | species | eukaryota | vertebrates | species | 44396 | click here |
| mergus merganser | Yes | species | eukaryota | vertebrates | species | 8880 | click here |
| merops apiaster | Yes | species | eukaryota | vertebrates | species | 265611 | click here |
| merops breweri | Yes | species | eukaryota | vertebrates | species | 457287 | click here |
| merops orientalis | Yes | species | eukaryota | vertebrates | species | 457316 | click here |
| mesembrinibis cayennensis | Yes | species | | | species | 1118748 | click here |
| micrastur gilvicollis | Yes | species | eukaryota | vertebrates | species | 56335 | click here |
| micrastur mintoni | Yes | species | | | species | 1042131 | click here |
| micrastur ruficollis | Yes | species | | | species | 1042132 | click here |
| microcerculus marginatus | Yes | species | eukaryota | vertebrates | species | 241545 | click here |
| microeca papuana | Yes | species | eukaryota | vertebrates | species | 254556 | click here |
| milvus migrans | Yes | species | eukaryota | vertebrates | species | 52810 | click here |
| mimus gilvus | Yes | species | eukaryota | vertebrates | species | 111998 | click here |
| mimus polyglottos | Yes | species | eukaryota | vertebrates | species | 60713 | click here |
| minla cyanouroptera | Yes | species | eukaryota | vertebrates | species | 201347 | click here |
| minla ignotincta | Yes | species | eukaryota | vertebrates | species | 201348 | click here |
| mionectes macconnelli | Yes | species | eukaryota | vertebrates | species | 254557 | click here |
| mionectes olivaceus | Yes | species | eukaryota | vertebrates | species | 430701 | click here |
| mionectes striaticollis | Yes | species | eukaryota | vertebrates | species | 170958 | click here |
| molothrus ater | Yes | species | eukaryota | vertebrates | species | 84834 | click here |
| molothrus badius | Yes | species | eukaryota | vertebrates | species | 84835 | click here |
| molothrus bonariensis | Yes | species | eukaryota | vertebrates | species | 84836 | click here |
| monarcha manadensis | Yes | species | eukaryota | vertebrates | species | 338466 | click here |
| monarcha trivirgatus | Yes | species | eukaryota | vertebrates | species | 381029 | click here |
| monasa nigrifrons | Yes | species | | | species | 882749 | click here |
| motacilla cinerea | Yes | species | eukaryota | vertebrates | species | 56325 | click here |
| motacilla clara | Yes | species | eukaryota | vertebrates | species | 180447 | click here |
| motacilla flava | Yes | species | eukaryota | vertebrates | species | 180448 | click here |
| muscicapa aquatica | Yes | species | eukaryota | vertebrates | species | 869913 | click here |
| muscicapa ferruginea | Yes | species | eukaryota | vertebrates | species | 254561 | click here |
| muscicapa striata | Yes | species | | | species | 1293958 | click here |
| myadestes ralloides | Yes | species | eukaryota | vertebrates | species | 127930 | click here |
| mycteria americana | Yes | species | eukaryota | vertebrates | species | 33587 | click here |
| myiagra alecto | Yes | species | eukaryota | vertebrates | species | 338447 | click here |
| myiarchus swainsoni | Yes | species | eukaryota | vertebrates | species | 204059 | click here |
| myiarchus tyrannulus | Yes | species | eukaryota | vertebrates | species | 196038 | click here |
| myiodynastes maculatus | Yes | species | eukaryota | vertebrates | species | 478610 | click here |
| myiomela leucura | Yes | species | eukaryota | vertebrates | species | 758459 | click here |
| myiopagis flavivertex | Yes | species | eukaryota | vertebrates | species | 502646 | click here |
| myiopagis viridicata | Yes | species | eukaryota | vertebrates | species | 196043 | click here |
| myiophobus fasciatus | Yes | species | eukaryota | vertebrates | species | 456386 | click here |
| myiothlypis coronata | Yes | species | | | species | 1851190 | click here |
| myiothlypis fraseri | Yes | species | | | species | 1851189 | click here |
| myiothlypis nigrocristata | Yes | species | eukaryota | vertebrates | species | 166067 | click here |
| myophonus caeruleus | Yes | species | eukaryota | vertebrates | species | 869933 | click here |
| myrmeciza fortis | Yes | species | eukaryota | vertebrates | species | 288075 | click here |
| myrmoborus myotherinus | Yes | species | eukaryota | vertebrates | species | 288070 | click here |
| myrmotherula axillaris | Yes | species | eukaryota | vertebrates | species | 123382 | click here |
| myrmotherula menetriesii | Yes | species | eukaryota | vertebrates | species | 288046 | click here |
| myzomela albigula | Yes | species | | | species | 1108851 | click here |
| myzomela nigrita | Yes | species | | | species | 1931009 | click here |
| myzomela obscura | Yes | species | eukaryota | vertebrates | species | 266323 | click here |
| myzomela sanguinolenta | Yes | species | eukaryota | vertebrates | species | 266325 | click here |
| nectarinia | Yes | | | vertebrates | genus | 145371 | click here |
| nectarinia senegalensis | Yes | species | eukaryota | vertebrates | species | 194945 | click here |
| nectarinia sperata | Yes | species | eukaryota | vertebrates | species | 512574 | click here |
| neochen jubata | Yes | species | eukaryota | vertebrates | species | 8882 | click here |
| neochmia temporalis | Yes | species | eukaryota | vertebrates | species | 247735 | click here |
| neocossyphus poensis | Yes | species | eukaryota | vertebrates | species | 127934 | click here |
| neopelma pallescens | Yes | species | eukaryota | vertebrates | species | 495247 | click here |
| neothraupis fasciata | Yes | species | eukaryota | vertebrates | species | 62226 | click here |
| newtonia brunneicauda | Yes | species | eukaryota | vertebrates | species | 125290 | click here |
| nigrita bicolor | Yes | species | eukaryota | vertebrates | species | 247721 | click here |
| niltava | Yes | | | vertebrates | genus | 427696 | click here |
| niltava davidi | Yes | species | eukaryota | vertebrates | species | 427697 | click here |
| niltava grandis | Yes | species | eukaryota | vertebrates | species | 869920 | click here |
| niltava sundara | Yes | species | eukaryota | vertebrates | species | 427698 | click here |
| ninox philippensis | Yes | species | eukaryota | vertebrates | species | 56289 | click here |
| ninox scutulata | Yes | species | eukaryota | vertebrates | species | 126857 | click here |
| nisaetus alboniger | Yes | species | eukaryota | vertebrates | species | 307441 | click here |
| numenius phaeopus | Yes | species | eukaryota | vertebrates | species | 161676 | click here |
| numida meleagris | Yes | species | eukaryota | vertebrates | species | 8996 | click here |
| nycticorax nycticorax | Yes | species | eukaryota | vertebrates | species | 8901 | click here |
| nystalus chacuru | Yes | species | eukaryota | vertebrates | species | 555299 | click here |
| nystalus maculatus | Yes | species | eukaryota | vertebrates | species | 135178 | click here |
| ochlerotatus | Yes | | | invertebrates | genus | 190765 | click here |
| ochlerotatus cantans | Yes | species | eukaryota | invertebrates | species | 120869 | click here |
| ochthoeca rufipectoralis | Yes | species | | | species | 1314668 | click here |
| oedistoma iliolophus | Yes | species | | | species | 1763895 | click here |
| oena capensis | Yes | species | eukaryota | vertebrates | species | 115679 | click here |
| olfersia | Yes | | | plants | genus | 385520 | click here |
| oreothlypis ruficapilla | Yes | species | eukaryota | vertebrates | species | 125952 | click here |
| oreothlypis superciliosa | Yes | species | eukaryota | vertebrates | species | 125950 | click here |