If you want to see groups of animals from the sky, you should board a hot air balloon. Rise up in the sky in the early hours of day and witness the awakening of the savannah. Upon landing you will be offered a glass of champagne and toast to a good flight and safe return. Breakfast is also possible.
Make sure to take a lot of pictures. When the sun rises, pay attention to the shadow of the balloon and of the animals. It will add an extra dimension to tit all.
The best time to do this is during the Great Migration. But expect the costs to be considerable. And book well in advance to avoid disappointment.
You can board the hot air balloon in Tanzania, but also in the Maasai Mara National Reserve in Kenya.