Wildlife photography is different and the last wildlife photography course in the Northern Kruger Park in South Africa made that clear once again.
Wildlife photography demands a lot of efforts from the photographer. Not only the environment is demanding, also the photographic subjects and the light. Some features of a camera that were included in high end devises do not work in the bush. They are mainly made for other purposes and one needs to be conscious about that.
For example the 3D-tracking autofocus setting, tested during the mentioned photography course in Kruger Park on a Nikon D800E. The focus picks up the wrong things, does not recognize the head/face of an animal and gets confused with the light. The photographer has to chose the focus point, otherwise what he wants in focus is not in focus. So, be careful where you use what autofocus setting and be conscious that the photographer got to do efforts to get it like he/she wants it.
Practice the different settings when you have time to play and not when you want it to work. That will make you happier with the results.