All your images are good. Well done! Maybe just remember to underexpose dark objects like elephants a little bit. It will help with the background colours and stop you from blowing the highlights (like the very light sky that you are currently getting with the elephant. This should be remembered with all dark skinned animals like elephants and buffalo. With digital cameras nowadays you don’t have to underexpose too much as long as you do not blow the highlights which you will be able to see from your cameras histogram. Hope you understand what I am trying to say! You are welcome to send more photos.