- Madagascan Green Pigeon
- Madagascan Wagtail
- Madeira Firecrest
- Magnificent Frigatebird
- Malabar Grey Hornbill
- Malabar Pied Hornbill
- Malagasy Bulbul
- Malagasy Kingfisher
- Malagasy Paradise Flycatcher
- Malagasy Pond Heron
- Malagasy Turtle Dove
- Malaysian Pied Fantail
- Mallard
- Mandarin Duck
- Mangrove Cuckoo
- Mangrove Swallow
- Mangrove Warbler
- Marabou Stork
- Marsh Tit
- Martial Eagle
- Martinique Oriole
- Mascarene Martin
- Mascarene Paradise Flycatcher
- Mascarene Swiftlet
- Masked Cardinal
- Masked Water Tyrant
- Masked Yellowthroat
- Mauritius Bulbul
- Mauritius Fody
- Mauritius Grey White-eye
- Mauritius Olive White-eye
- Mayotte Drongo
- Mayotte Sunbird
- Mayotte White-eye
- McConnell's Flycatcher
- Meadow Pipit
- Mediterranean Short-toed Lark
- Melodious Warbler
- Mew Gull
- Mistle Thrush
- Monk Parakeet
- Montezuma Oropendola
- Mountain Buzzard
- Mourning Collared Dove
- Mourning Dove
- Mourning Sierra Finch
- Mouse-colored Tyrannulet
- Moustached Warbler
- Muscovy Duck
- Musician Wren
- Mute Swan