- Magellanic Penguin
- Magpie Tanager
- Malabar Pied Hornbill
- Malabar Trogon
- Malachite Kingfisher
- Malaysian Pied Fantail
- Malaysian Plover
- Mallard
- Marabou Stork
- Marbled Murrelet
- Marico Sunbird
- Marshall's Iora
- Martial Eagle
- Masked Gnatcatcher
- Medium Egret
- Melodious Warbler
- Mistle Thrush
- Mocking Cliff Chat
- Monk Parakeet
- Moorland Chat
- Moorland Francolin
- Mosque Swallow
- Mountain Wagtail
- Mourning Sierra Finch
- Moussier's Redstart
- Muscovy Duck
- Mute Swan