Learn more about a specific fish or wildlife species in Washington.
Species marked with an "AIS" badge are aquatic invasive species. For more information about these environmentally and economically destructive species, visit the Aquatic invasive species page.
| Species | Category |
|---|---|
| Melissa arctic (Oeneis melissa beanii) | Butterflies and moths |
| Merriam's shrew (Sorex merriami) | Mammals |
| Minke whale (Balaena acutorostrata) | Mammals |
| Mission Creek Oregonian (snail) (Cryptomastix magnidentata) | Molluscs |
| Monarch butterfly (Danaus plexippus) | Butterflies and moths |
| Moose (Alces alces) | Mammals |
| Morrison's bumble bee (Bombus morrisoni) | Arthropods |
| Mountain beaver (Aplodontia rufa) | Mammals |
| Mountain goat (Oreamnos americanus) | Mammals |
| Mountain quail (Oreortyx pictus) | Birds |
| Mountain sucker (Catostomus platyrhynchus) | Fish |
| Mountain whitefish (Prosopium williamsoni) | Fish |
| Muskrat (Ondatra zibethicus) | Mammals |
| Native littleneck clam (Leukoma staminea) | Molluscs |
| Nevada skipper (Hesperia nevada) | Butterflies and moths |
| Night snake (Hypsiglena torquata) | Reptiles |
| Nimapuna tigersnail (Anguispira nimapuna new spp.) | Molluscs |
| North Pacific right whale (Eubalaena japonica) | Mammals |
| Northern alligator lizard (Elgaria coerulea) | Reptiles |
| Northern bog lemming (Synaptomys borealis) | Mammals |
| Northern cloudy wing (Thorybes pylades) | Butterflies and moths |
| Northern desert nightsnake (Hypsiglena chlorophaea deserticola) | Reptiles |
| Northern flying squirrel (Glaucomys sabrinus) | Mammals |
| Northern forestfly (Lednia borealis) | Arthropods |
| Northern goshawk (Accipiter gentilis) | Birds |