Great horned owls were not properly benign and were being killed by companions in adventure moment. I have fixed that.
Another issue I have hopefully fixed is the issue in which dwarf fortresses were being placed in inappropriate climates because they were set to be supported by mountain biomes. The problem basically meant they never, ever expanded from their starting location. That is because unlike other sites a dwarf fortress must set up a hillocks nearby before it can create another fortress, other sites do not have that problem and so can thrive with mountain as their biome-support. Now it should not happen that dwarf fortresses are set up on mountains unless they are in a location suitable for them to set up a nearby hillocks, allowing them to set up another fortress, possibly some distance away (dwarf fortress considers that to be more than a few hours walk!).