Science magazines
- Makou
- Malheur Wire-lettuce
- Mancos Milk-vetch
- Mann's Bluegrass
- Many-flowered Navarretia
- Mapele
- Marbled Murrelet
- Marcescent Dudleya
- Mariana Common Moorhen
- Mariana Crow
- Mariana Fruit Bat
- Mariana Gray Swiftlet
- Marianas Mallard
- Marin Dwarf-flax
- Mariposa Pussypaws
- Mariscus Fauriei
- Mariscus Pennatiformis
- Marsh Sandwort
- Maryland Darter
- Masked Bobwhite