When reading Duncan Browns book recently, (Are Trout South African), I became aware of the depth of my prejudices.  Duncan does a fine job of pointing out the nuances and peculiarities that we apply in deciding if something is indigenous or not, and it is a thought provoking read. I go for Trout , with a capital T, (Alien) and definitely not bass (with a lower case B), ( also alien). I strongly dislike wattles and brambles (Alien), but love the sight of a stand of poplars (also alien). I don’t care much for scalies [AKA “yellowfish”] (indigenous),  and I