- Magpie-lark
- Magpie Goose
- Mallard
- Mandarin Duck
- Maned Duck
- Mangrove Warbler
- Marbled Duck
- Marbled Godwit
- Marsh Sandpiper
- Marsh Tit
- Marsh Warbler
- Masked Booby
- Masked Lapwing
- Masked Shrike
- Meadow Bunting
- Meadow Pipit
- Mediterranean Gull
- Medium Egret
- Melodious Warbler
- Menetries's Warbler
- Merlin
- Mongolian Finch
- Mongolian Ground Jay
- Mongolian Gull
- Mongolian Lark
- Montezuma Oropendola
- Mottled Duck
- Mourning Wheatear
- Mugimaki Flycatcher
- Mute Swan