It's really pretty dependent on situation. I mostly use single point, AF-C. But "wildlife" also describes bouncing around in the back of a jeep as your driver tries to parallel a hunting big cat. In that case I'd use AF-C, the most intelligent dynamic pattern (the top one), and I'd shoot a lot of frames!
I usually use closest subject only if I'm shooting BIF and then I disable it, to allow the focus to avoid refocusing in the event that a BIF flies behind, say, a tree. Similarly in motorsport if I have fence tops in between me and the cars...
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!