The focus mode will also vary; you could use single-point autofocus for stationary subjects and continuous autofocus for subjects in motion.
The settings you should use for wildlife photography will depend on various factors like subject matter, lighting conditions and your creative intent. However, a good starting point might include a fast shutter speed (at least 1/1000sec for moving subjects), a versatile aperture (around f/5.6 to f/8) and an ISO setting that balances between image quality and exposure (ISO 400 is often a safe bet). The focus mode will also vary; you could use single-point autofocus for stationary subjects and continuous autofocus for subjects in motion.