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![](https://lemmy.world/pictrs/image/a4cb9e53-9f83-42ea-ba63-49eb81a0e04c.jpeg)
Dogs would be a good example for ring species, which show the outer limits of the species definition, if they they occurred in the wild in their many diverse forms. But since they are not, I’d group them as one species still, as their origin is artificial and so are, at least partly, their means of reproduction.
So far, „sky“ is pretty nice