We did not see a lot of eagles in the Serengeti, only a few. Here are my favorite African Fish Eagle shots. You can find more information on this bird here. It is a rather large (wingspan up to 2.4m) and beautiful eagle.
The other common eagle we saw was the tawny eagle, again with a wikipedia link here. Smaller than the fish eagle, with only brownish colors, netherthelss I personally find the bird very appealing. I wish I would have seen them in flight.