- MacGillivray's Warbler
- Madagascan Buttonquail
- Madagascan Cisticola
- Madagascan Cuckooshrike
- Madagascan Fish Eagle
- Madagascan Harrier-Hawk
- Madagascan Hoopoe
- Madagascan Lark
- Madagascan Magpie-Robin
- Madagascan Mannikin
- Madagascan Owl
- Madagascan Stonechat
- Madagascan Wagtail
- Magnificent Frigatebird
- Magpie Shrike
- Malachite Kingfisher
- Malagasy Brush Warbler
- Malagasy Bulbul
- Malagasy Coucal
- Malagasy Green Sunbird
- Malagasy Kestrel
- Malagasy Kingfisher
- Malagasy Paradise Flycatcher
- Malagasy Turtle Dove
- Malagasy White-eye
- Mallard
- Mandarin Duck
- Mangrove Kingfisher
- Mangrove Swallow
- Mangrove Warbler
- Many-banded Aracari
- Many-spotted Hummingbird
- Marabou Stork
- Marble-faced Bristle Tyrant
- Marico Flycatcher
- Marico Sunbird
- Marsh Sandpiper
- Marsh Tit
- Martial Eagle
- Masked Crimson Tanager
- Masked Flowerpiercer
- Masked Trogon
- Masked Water Tyrant
- Meadow Pipit
- Melodious Blackbird
- Melodious Warbler
- Meves's Starling
- Mexican Violetear
- Meyer's Parrot
- Middle Spotted Woodpecker
- Military Macaw
- Mistle Thrush
- Mocking Cliff Chat
- Montagu's Harrier
- Montane Woodcreeper
- Monteiro's Hornbill
- Montezuma Oropendola
- Morelet's Seedeater
- Moss-backed Tanager
- Mountain Bluebird
- Mountain Elaenia
- Mountain Masked Apalis
- Mountain Wheatear
- Mourning Collared Dove
- Moustached Grass Warbler
- Muscovy Duck
- Mute Swan