- Mackinnon's Shrike
- Macleay's Honeyeater
- Madagascar Blue Pigeon
- Madagascar Blue Vanga
- Madagascar Buttonquail
- Madagascar Buzzard
- Madagascar Cuckoo-Hawk
- Madagascar Cuckooshrike
- Madagascar Fish Eagle
- Madagascar Green Pigeon
- Madagascar Harrier-Hawk
- Madagascar Hoopoe
- Madagascar Jacana
- Madagascar Lark
- Madagascar Magpie-Robin
- Madagascar Nightjar
- Madagascar Pygmy Kingfisher
- Madagascar Sparrowhawk
- Madagascar Stonechat
- Madagascar Wagtail
- Magellanic Oystercatcher
- Magellanic Penguin
- Magellanic Plover
- Magellanic Tapaculo
- Magnificent Frigatebird
- Magpie-lark
- Magpie Goose
- Magpie Mannikin
- Magpie Shrike
- Magpie Starling
- Malabar Pied Hornbill
- Malachite Kingfisher
- Malachite Sunbird
- Malagasy Bulbul
- Malagasy Coucal
- Malagasy Kestrel
- Malagasy Kingfisher
- Malagasy Paradise Flycatcher
- Malagasy Sacred Ibis
- Malagasy Turtle Dove
- Mallard
- Maned Duck
- Mangrove Warbler
- Marabou Stork
- Marbled Godwit
- Marico Flycatcher
- Marico Sunbird
- Maroon-bellied Parakeet
- Marquesan Imperial Pigeon
- Marsh Sandpiper
- Marsh Tit
- Marshall's Iora
- Martial Eagle
- Masked Gnatcatcher
- Masked Lapwing
- Masked Water Tyrant
- Maxwell's Black Weaver
- Meadow Pipit
- Mediterranean Gull
- Mediterranean Short-toed Lark
- Medium Ground Finch
- Melancholy Woodpecker
- Meller's Duck
- Melodious Warbler
- Meves's Starling
- Mexican Violetear
- Meyer's Parrot
- Miombo Blue-eared Starling
- Mistle Thrush
- Mistletoebird
- Mitred Parakeet
- Mombasa Woodpecker
- Monk Parakeet
- Montagu's Harrier
- Monteiro's Hornbill
- Mottled Duck
- Mountain Bulbul
- Mountain Caracara
- Mountain Wagtail
- Mountain Wheatear
- Mourning Collared Dove
- Mourning Dove
- Mourning Sierra Finch
- Moustached Wren
- Mrs. Gould's Sunbird
- Muscovy Duck
- Mute Swan
- Myrtle Warbler