| Common Name | Scientific name |
|---|---|
| Magnolia de Jardin | Magnolia jardensis |
| Magnolia espinalii | Magnolia espinalii |
| Maguari Stork | Ciconia maguari |
| Mallard | Anas platyrhynchos |
| Mandarin Duck | Aix galericulata |
| Maned Duck | Chenonetta jubata |
| Mango | Mangifera indica |
| Mangrove Cuckoo | Coccyzus minor |
| Mangrove Hummingbird | Amazilia boucardi |
| Mangrove Rail | Rallus longirostris |
| Mangrove Swallow | Tachycineta albilinea |
| Mangrove Vireo | Vireo pallens |
| Manx Shearwater | Puffinus puffinus |
| Marabou Stork | Leptoptilos crumenifer |
| Marbled Godwit | Limosa fedoa |
| Marbled Murrelet | Brachyramphus marmoratus |
| Marbled Teal | Marmaronetta angustirostris |
| Marbled Wood-Quail | Odontophorus gujanensis |
| Mariana Swiftlet | Aerodramus bartschi |
| Markham's Storm-Petrel | Oceanodroma markhami |
| Marmora's Warbler | Sylvia sarda |
| Maroon-bellied Parakeet | Pyrrhura frontalis |
| Maroon-chested Ground-Dove | Claravis mondetoura |
| Maroon-fronted Parrot | Rhynchopsitta terrisi |
| Marsh Sandpiper | Tringa stagnatilis |
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