There's an interesting story in the Alaska Daily News-Miner newspaper about the use of Tasers on wildlife.
Seems the Alaska Board of Game passed a rule that disallows "catch and release" hunting -- tasing an animal, having your photo taken with it, then letting it go. You can still use a Taser in self-defense, though.
Turns out Alaska wildlife officials, who have been specially trained, can use wildlife Tasers as an alternative to tranquilizing an animal. I haven't heard of any such move by Montana Fish, Wildlife and Parks officials, but it seems to be another possible tool for wildlife management.