A childhood belief about aeroplanes

Not my belief, but as a kid in pre-war New Guinea, aeroplanes were about the only way of getting around, so even the tribesmen were used to them, even if their silly white owners hadn't taught them to flap their wings properly like other birds, which they were naturally assumed to be. But as roads started to be built, and motor vehicles arrived, the locals were terrified. Anything that moved was obviously alive, and while aeroplanes had quite acceptable wings like birds, something that moved on the ground without legs must be very bad witchcraft indeed.