I think her point is that the local maximum dictates size but not shape; the shape is appropriate for the maxima of different ecosystems. I just realised that

I think her point is that the local maximum dictates size but not shape; the shape is appropriate for the maxima of different ecosystems. I just realised that she forgot purring, which only some cats do (e.g. housecats and snow leopards, yes; lions and panthers, no, but rather roar). Those are adaptations to local maxima.