Enemies should be enemies or monsters. Wildlife should be scenery.
I'm 50-50 on that. I feel like it would be a little odd if the areas immediately outside of towns are populated entirely by monsters, as opposed to wildlife. I feel like you should have to travel a little to run into the really
It helps if the wildlife looks a little ferocious though, at least. Bunnies and sheep just don't quite cut it, although I loved the irony of a player killing hordes of sheep, then getting mauled from behind by a giant one like Steelfleece. Pugils seemed ok for example, with their long jagged teeth.
As a RNG in FFXI, wildlife worked ok because I felt a bit like a hunter, especially when I was farming.