- Magellanic Penguin
- Magnificent Frigatebird
- Magpie Shrike
- Malachite Kingfisher
- Mallard
- Mangrove Swallow
- Mangrove Warbler
- Marabou Stork
- Marico Flycatcher
- Marico Sunbird
- Marsh Tit
- Masked Water Tyrant
- Meadow Pipit
- Mediterranean Gull
- Medium Egret
- Melodious Warbler
- Meves's Starling
- Meyer's Parrot
- Monk Parakeet
- Montagu's Harrier
- Monteiro's Hornbill
- Montezuma Oropendola
- Mosque Swallow
- Mountain Caracara
- Mountain Wheatear
- Mourning Collared Dove
- Mourning Dove
- Mute Swan
- Myrtle Warbler