Tom Nook is a tanuki, not a raccoon. Tanuki aren't raccoons they just look like them kinda. Tanuki are canines, whereas Raccoons are in the family Procyonidae. Raccoons' front paws are hand-like, whereas Tanukis' front paws are like a dog. Raccoons are native to North America, while Tanuki are only native to Japan. See this helpful slide from Tumblr on their differences.
Never interrupt a raccoon heist. I accidentally did that once and got jumped by 3 of them because I scared the lil dudes. Had to get rabies shots. Now they just swipe the eggs my ducks lay outside and leave my house and trash alone. They've been terrorizing my neighbor. Guess she better start leaving treats or something too lmao.