| lynx | ryś |
| macaw | ara |
| maggot | larwa, czerw |
| magpie | sroka |
| mallard | kaczka krzyżówka |
| mare | klacz |
| marmot | świstak |
| moggy/moggie | dachowiec |
| mole | kret |
| mongrel | kundel |
| monitor lizard | waran |
| moose/elk | łoś |
| moth | ćma |
| nanny-goat | koza |
| newt | traszka |
| nightingale | słowik |
| nutcracker | orzechówka (gatunek ptaka) |
| omnivorous | wszystkożerny |
| orangutan(g) | orangutan |
| ostrich | struś |