- Mackinnon's Shrike
- Maghreb Magpie
- Magnificent Frigatebird
- Magnolia Warbler
- Magpie Shrike
- Malachite Kingfisher
- Malachite Sunbird
- Malagasy Coucal
- Malayan Laughingthrush
- Malayan Partridge
- Malayan Peacock-Pheasant
- Malayan Swamp Babbler
- Malaysian Pied Fantail
- Malaysian Plover
- Mallard
- Mandarin Duck
- Mangrove Swallow
- Mangrove Warbler
- Manx Shearwater
- Many-colored Rush Tyrant
- Marabou Stork
- Marbled Godwit
- Marico Flycatcher
- Marico Sunbird
- Maroon-breasted Philentoma
- Marsh Sandpiper
- Marsh Tit
- Marsh Warbler
- Martial Eagle
- Masked Booby
- Masked Flowerpiercer
- Masked Shrike
- Masked Tityra
- Meadow Pipit
- Mediterranean Gull
- Mediterranean Short-toed Lark
- Mekong Wagtail
- Melodious Blackbird
- Melodious Warbler
- Meyer's Parrot
- Middle Spotted Woodpecker
- Milky Stork
- Mistle Thrush
- Mistletoe Tyrannulet
- Mocking Cliff Chat
- Monk Parakeet
- Monotonous Lark
- Montagu's Harrier
- Montane Nightjar
- Montane Woodcreeper
- Montezuma Oropendola
- Moorland Chat
- Moorland Francolin
- Morelet's Seedeater
- Mosque Swallow
- Mountain Caracara
- Mountain Chat
- Mountain Elaenia
- Mountain Fulvetta
- Mountain Peacock-Pheasant
- Mountain Tailorbird
- Mountain Thrush
- Mountain Wagtail
- Mourning Collared Dove
- Mourning Dove
- Mourning Sierra Finch
- Mouse-colored Penduline Tit
- Moussier's Redstart
- Moustached Babbler
- Moustached Grass Warbler
- Moustached Warbler
- Mute Swan
- Myrtle Warbler