Sorry to practice VILE NECROMANCY here, but with the release of Captain Mayday's
VBASE modding toolkit, making new critters is significantly easier to do.
Anyway, I wanted to check if this was still semi-active, since a lot of work was already done here, and I was just recently starting on a Zoology Mod using VBASE with a similar goal in mind. Rather than create such an extreme variety of animals all across the board though, my goal is to focus on making Archetypical creatures. For example, when adding in birds, rather than creating entries for the Emperor Penguin, Macaroni Penguin, Chinese Penguin, and so on (each with nearly identical attributes), I'd create a single archetypical Penguin entry. However, some animals are different enough to warrant diversifying them; for instance Sea Turtles and Snapping Turtles, though they share a name, live in different climates and have very different attributes.
The golden rule I'm working off of is that, so long as a Dwarf could tell a reasonable difference between any two animals in a group, and would interact with them in a noticeably different way, they deserve a separate entry.
Anyway, the reason I'm grave-digging here is to see if you, or if anyone else who contributed to the project, was interested in merging this project with the VBASE system, and working on implementing a simplified Ark Mod. I've got a
Archetypical Zoology Mod Thread started here, to give an idea of what I'm talking about.