| Common Name | Scientific name |
|---|---|
| Marsh Tit | Poecile palustris |
| Marsh Warbler | Acrocephalus palustris |
| Marsh Wren | Cistothorus palustris |
| Martinique Oriole | Icterus bonana |
| Masked Booby | Sula dactylatra |
| Masked Duck | Nomonyx dominicus |
| Masked Lapwing | Vanellus miles |
| Masked Shrike | Lanius nubicus |
| Masked Tityra | Tityra semifasciata |
| Masked Yellowthroat | Geothlypis aequinoctialis |
| Maui Akepa | Loxops ochraceus |
| Maui Alauahio | Paroreomyza montana |
| Maui Nukupuu | Hemignathus affinis |
| Maui Parrotbill | Pseudonestor xanthophrys |
| Maui-nui Akialoa | Akialoa lanaiensis |
| McCown's Longspur | Rhynchophanes mccownii |
| McKay's Bunting | Plectrophenax hyperboreus |
| Meadow Bunting | Emberiza cioides |
| Meadow Pipit | Anthus pratensis |
| Mealy Parrot | Amazona farinosa |
| Mediacara comun | Sapotaceae spp. |
| Mediterranean Gull | Ichthyaetus melanocephalus |
| Mediterranean Shearwater | Puffinus yelkouan |
| Melodious Blackbird | Dives dives |
| Melodious Warbler | Hippolais polyglotta |
RingBase adheres to EURING codes.
