Looks nice! But here are two things that'd make it even more useful for both fantasy and post-apocalyptic genres:
- Giant Rat (the current rat might not have enough details to be simply scaled up, but a giant rat can be scaled down if they need a small rat)
- Giant Spider (preferably with fangs that glow green during attack, at least if you make a radioactive version of it)
These two animals are the ones I've been looking for