Definitely forgot Insectoid.

The class Aves (commonly called avians) are iffy. The reason I say that is because avians are one of the few biological classes of animals that has definitively shown a genetic predisposition to favor smaller bodies. 

Insects, it has shown are able to grow as large as the amount of oxygen they can successfully filter to their organs. Ichthyology has shown that evolution favors size based on principle and demand. Avians seem to fill a niche specifically designed for smaller creatures. The same can be said of the order Rodentia.

Would you guys prefer a POINT BASED TRAIT system or a CLASSIFICATION SYSTEM where you pick a category that has assigned functions.

Like

[b]Mammalia[/b]
- [b]Rodentia[/b] (Population Bonus)
- [b]Primates[/b] (Versatility Bonus)
- [b]Carnivora[/b] (Military Bonus)

et cetera, et cetera!