Ah, well, erm, not so long ago we had a suggestion that we split it into Wildlife, Zoo Animals and Pets. After much serious deliberation we decided to leave it as it is, but the topic is always open for review.
One of the problems is that if we subdivide the existing categories and people move their photos into the new pigeonholes, it will break all the existing links etc, and we don't want to do that.
However, if there's enough demand, we'll reconsider.
