During our recent trip to Zambia, my wife and I spent four days in the Lower Zambezi National Park. The camp we stayed at (Chongwe River Camp) offers both conventional jeep based safari's as well as boat based trip along the Zambezi River. The boating is particularly good for birding. Here are some bird images taken both from the jeep and from the boat.
These are really good - even though some of them are relatively approachable, it isn't easy to get great images like these (I know I've tried). Even on a safari vehicle there are always those who aren't interested in birds or who know how to sit still. Beautiful set.