Quote Originally Posted by EdN
If you think that you will be encountering animals in a still life situation, like sitting under trees, not moving fast, and possibly be in relative close proximity from a vehicle

This is the point I was trying to make earlier. In the preserves we visited in Africa, the animals were fairly accustomed to the Land Rovers and thus came quite close, or at least didn't run off as we drove up. Also, most safaris are run through the daylight hours, and at those times many of the larger animals are more sedentary. No need for the reach, fast AF and frame rate of the 7D for a shot like this (100mm FF equivalent focal length):