This prompt is half-geographical, half political. Fences make good neighbours, they say, especially when your neighbouring species are prone to violent outbursts. How do you keep your orcs out of your elves, your sentient termites out of your treants, and your preds out of herb turf? Even two friendly species are going to have some zoning issues if there's too much casual overlap, so on this Worldbuilding Wednesday, how did you plan out your territorial boundaries, and how are they enforced? This might be with the enforcement of political borders, but natural borders like islands with a nice big bit of ocean in between, or mountain ranges, can be natural borders.