Montana: Game animals, by law and rule in Montana, can only be hunted by licensed hunters with certain, specified weapons - and an atlatl is not one of them. However, non-regulated wildlife may be taken with any type of weapon, any time of year, and no license is required. These include squirrels, porcupine, raccoon, coyote, weasel, skunk, badger and red fox. Fish that you could take with an atlatl would be carp and sucker. Almost all birds are either game animals or protected under federal regulation with the exception of rock dove (pigeons), European sparrows and eastern starlings.
(Source: thudscave.com)