Quote Originally Posted by Thurbane View Post
Yep, there's always stupid exceptions like Roc (or Battletitan) being an animal...

3.0 also had the Beast type, just to muddy the waters a little more.
Actually, Beast type made things clearer. As mentioned, it's for dinos and Dire creatures. Big, beefy animals that deserve to be big and beefy mechanically, therefore getting different HD to make it so.