Is Boise Going To Be Invaded By Bullfrogs?

I've noticed several big adorable bullfrogs in my yard and since Idaho is so dry, I decided to check online and find out what these cuties are doing in the dry desert in such big quantities!

I found out that these guys are "Alligator Food" down south but they are migrating fast to the north and there is no big predator to eat them here in Idaho!  Will Boise resemble that 70's horror movie, "Frogs"?