You'll find yourself holding the camera to your eye for much longer periods than normal as you observe the animals and wait for the perfect moment. This can be very tiring. The vehicle window makes an excellent support and can be moved up and down to suit your height. In vehicles with pop-up tops, rest your camera on the roof while following the action. Use a piece of clothing or camera bag to rest the camera on and turn the engine off to stop unnecessary vibrations.
Animals are at their most active early in the morning and late in the day.
Be prepared to use 400 ISO film at these times and switch to your standard film as soon as it's bright enough. Unless you're very well equipped and dedicated, photographing birds can be very frustrating. At least the lilac breasted roller gives you a chance to get close - but that's with a super telephoto lens. Zoos and wildlife sanctuaries are interesting subjects in their own right but are also great places to practice and prepare for photographing animals in the wild. Spend a day at your local zoo or wildlife park before heading off on safari and you'll discover the limitations of your equipment and how close you need to get to animals large and small to make strong pictures.