[Excerpts from Online Regulations]
Page 3, Online Regulations
“It is unlawful to use any recorded or electrically amplified bird or animal calls, sounds or imitation of bird or animal calls or sounds to assist in the hunting, taking, killing or capturing of any wildlife except predatory animals per MC 87-3-108.”

Page 11 of Moose, Bighorn Sheep, Mountain Goat Regulations,
“It is illegal to use a recorded or electrically amplified game call to hunt big game.”

Montanan Code
87-3-108. Restrictions on use of reproduced sounds - It is unlawful to use any recorded or electrically amplified bird or animal calls or sounds or recorded or electrically amplified imitations of bird or animal calls or sounds to assist in the hunting, taking, killing, or capturing of wildlife, except predatory animals and those birds not protected by state or federal law.

After a discussion with an officer, FOXPRO was informed that electronic calls and decoys may be used for fox, coyote, bobcat, and raccoon only.  Montana prohibits the use of electronic calls and decoys on big game, turkey, and crows. Crows are considered a federally protected migratory game bird.

[Overview]
You may use electronic game calls only for predatory animals and birds not protected by federal law.