- Madeira Firecrest
- Maghreb Magpie
- Magnificent Frigatebird
- Magnolia Warbler
- Malabar Barbet
- Malabar Grey Hornbill
- Malabar Pied Hornbill
- Malagasy Turtle Dove
- Mallard
- Mandarin Duck
- Maned Duck
- Marbled Duck
- Marsh Tit
- Mascarene Martin
- Mascarene Paradise Flycatcher
- Mascarene Swiftlet
- Masked Lapwing
- Masked Shrike
- Meadow Pipit
- Mealy Amazon
- Mediterranean Gull
- Medium Egret
- Melodious Warbler
- Merlin
- Mexican Violetear
- Military Macaw
- Mistle Thrush
- Montagu's Harrier
- Montezuma Oropendola
- Mountain Imperial Pigeon
- Mourning Dove
- Moussier's Redstart
- Moustached Laughingthrush
- Mute Swan
- Myrtle Warbler