I'll admit right up front - I am a stubble jumping kadiddlehopper from the prairie province of Alberta. We don't get monsters like that around here. I know nothing about them, and I don't WANT to know anything about them.
But - if that was in my yard, city ordnances, firearm laws, bureaucratic BS be damned - I'd go out with the M14 and a couple 20 rounders and I would waste that critter without a second thought! You can't have something like that crawling around with toddlers and pets running around.