| Common Name | Scientific name |
|---|---|
| Mottled Owl | Ciccaba virgata |
| Mottled Petrel | Pterodroma inexpectata |
| Mountain Anon (Anon de Monte) | Anon de monte |
| Mountain Bluebird | Sialia currucoides |
| Mountain Chickadee | Poecile gambeli |
| Mountain Chiffchaff | Phylloscopus lorenzii |
| Mountain Elaenia | Elaenia frantzii |
| Mountain Plover | Charadrius montanus |
| Mountain Quail | Oreortyx pictus |
| Mountain Thrush | Turdus plebejus |
| Mountain Trogon | Trogon mexicanus |
| Mountain guava (Guayaba de monte) | Guayaba de monte |
| Mourning Dove | Zenaida macroura |
| Mourning Warbler | Geothlypis philadelphia |
| Mouse-colored Tyrannulet | Phaeomyias murina |
| Moustached Antwren | Myrmotherula ignota |
| Moustached Laughingthrush | Garrulax cineraceus |
| Mugimaki Flycatcher | Ficedula mugimaki |
| Murphy's Petrel | Pterodroma ultima |
| Muscovy Duck | Cairina moschata |
| Mute Swan | Cygnus olor |
| Myrtle Warbler | Setophaga coronata |
| Namaqua Dove | Oena capensis |
| Nanday Parakeet | Aratinga nenday |
| Narcissus Flycatcher | Ficedula narcissina |
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