Not all racing pigeons seem so clued up ...back in Namibia a couple of years back, read about one that nearly got shot for landing in one of the diamond areas (can be used to smuggle out the gems). However, its life was spared when it was noticed the bird was wearing a British ring! The manager felt sorry for it and, I think it was sent to Jo'burg and ? eventually back to the UK (bit hazy memory on this last bit).
Anyhow it was on a race from France to the UK and clearly took the wrong turn! Certainly wasn't the quickest way home!