My cats also are great watchcats....from everything to bugs or outside people walking too close to the house. They hear things I can’t and when they perk up —I take notice and action. They also will surround a bug which gives me time to get the vacuum.
My cat, Gracie, did a little flaminco dance in front of my wife yesterday, blocking her way and preventing her from stepping on a scorpion that had gotten into the house. Between scorpion spotting and stalking palmetto bugs, my two little girls are quite adept at letting me know when something isn’t quite right in the house.