- Magnificent Frigatebird
- Magnolia Warbler
- Magpie-lark
- Malachite Kingfisher
- Malagasy Bulbul
- Malagasy Kingfisher
- Malagasy Paradise Flycatcher
- Malagasy Pond Heron
- Malagasy Turtle Dove
- Mallard
- Mandarin Duck
- Maned Duck
- Mangrove Swallow
- Mangrove Vireo
- Mangrove Warbler
- Marabou Stork
- Marble-faced Bristle Tyrant
- Marbled Godwit
- Marico Sunbird
- Maroon-tailed Parakeet
- Marsh Sandpiper
- Marsh Tit
- Mascarene Martin
- Mascarene Paradise Flycatcher
- Masked Flowerpiercer
- Masked Lapwing
- Masked Tityra
- Masked Trogon
- Masked Water Tyrant
- Mayan Antthrush
- Mayotte Drongo
- Mayotte Sunbird
- Mayotte White-eye
- Meadow Pipit
- Mediterranean Gull
- Melodious Blackbird
- Melodious Warbler
- Mexican Sheartail
- Meyer's Parrot
- Mistle Thrush
- Mocking Cliff Chat
- Montagu's Harrier
- Montane Woodcreeper
- Moorland Chat
- Morelet's Seedeater
- Moss-backed Tanager
- Mountain Wagtail
- Mourning Collared Dove
- Moustached Antpitta
- Moustached Grass Warbler
- Musk Duck
- Musk Lorikeet
- Mute Swan
- Myrtle Warbler