Prohibited species: means a live, exotic wildlife species, subspecies, or hybrid of that species, including viable embryos or gametes, that may not be possessed, sold, purchased, exchanged, or transported in Montana, except as provided in 87-5-709, MCA, or ARM 12.6.2220.
Amphibians
Frogs
- African clawed frog (Xenopus laevis)
- North American bullfrog (Rana catesbeiana)
Reptiles
Snakes
- African rock python (Python sebae)
- Alligatoridae family
- Amethystine python (Morelia amethistina)
- Austrialian elapids (All species in family Elapidae)
- Boomslang (Dispholidus tyypus)
- Burrowing asps (All species in the family Atractaspidae)
- Cobras (All species in the family Elapidae)
- Coral snakes (All species in the family Elapidae)
- Crocodylidae family
- Green Anaconda (Eunectes marinus)
- Indian python - including the Burmese python (Python molurus)
- Kraits (All species in the family Elapidae)
- Mambas (All species in the family Elapidae)
- Pit vipers and true vipers (All species in the family Viperidae except species indigenous to Montana)
- Reticulated python (Python reticulatus)
Crustaceans
- Rusty crayfish (Orconectes rusticus)
Fish
- Bighead carp (Hypophthalmic nobilis)
- Black carp (Mylopharyngodon piceus)
- Eurasian Ruffe (Gymnocephalus cernuus)
- Grass carp (Ctenopharyngodon idella)
- Round goby (Neogobius melanostomus)
- Silver carp ( Hypophthalmic molitrix)
- Snakehead fish (Genus Channa and Parachanna (29 species)
- Walking catfish (Clarias batachus)
- White perch (Morone Americana
- Zander - European pikeperch (Sander lucioperca)
Mammals
- Addax (Addax nasomaculatus)
- Apes (primates in the family Pongidae)
- Axis deer (Axis axis)
- Barbary sheep or Auoudad (Ammotragus lervia)
- Bats (Sub order microchioptera)
- Brushed-tailed possum (Trichosurus Vulpecula)
- Chamois (Rudicapra sp.)
- Collared peccary (javelina) ( Tayassu tajacu)
- Exotic goats and Ibexes (All species in the genus Capra except domestic goats, Capra hircus)
- Foxes (Vulpes sp.)
- Gibbons (primates in the family Hylobatidae)
- Mouflon sheep (Ovis musimon)
- New World Primates (family Cebidae)
- Nutria (Myocastor coypus)
- Old World Monkeys (primates in the family Cercopithecidae)
- Oryx and Gemsbok ( Oryx besia, Oryx dammah, Oryx gazella, Oryx leucoryx)
- Raccons (Procyon sp.)
- Reedbucks (Redunca sp.)
- Red deer (Cervus elaphus elaphus)
- Roe deer (Capreolus capreolus and Capreolus pygarus)
- Rusa deer (Cervus timorensis)
- Russian boar, European boar and hybrids thereof (Sus scrofa scrofa)
- Shambar deer (Cervus unicolor)
- Sika deer (Cervus Nippon)
- Skunks (Genus Spilogale, Conepatus, and Methitis)
- Short-tailed opossum (Monodelphis domestica)
- Southern flying squirrel (Glaucomys volans)
- Tahr (Hemitragus sp.)
- Virginia opossum or North American Opossum (Didephis virginiana)
Mollusks
- New Zealand mudsnail (Potamopyrgus antipodarum)
- Quagga mussel (Dreissena bugensis)
- Zebra mussel (Dreissena polymorpha)