Bloody Big Bug

Well, I think (fingers cross, prayers to heaven) I've found the last big bug in the game but I've just discovered across this big bug in the real world. Actually, it's sitting on my wall over the computer as I type this (I swear it's preparing to pounce) and I have no idea what it is or how I should defend myself if it does decide to strike. I've never seen one of these in my life before the last couple of weeks when I've noticed them in various places around town. It looks like the kind of bug I should either eat as part of a bushtucker trial or shoot as part of a Starship Troopers re-enactment.