Armadillos seem pretty unaware of what goes on around em. I have shot numerous ones out in the open, often walking within 20 feet of them before they even get startled. They don’t seem to hear or see very well.
They are mostly blind or extremely near sighted. They appear to hear well, though.
I set a cage trap and use a pair of 2 X 6 boards to funnel them in. We’ve nailed four this year.