I believe the majority of the buffalo departed in May 2006 ... hence the numerous specimens in the February photograph. In the second photo, the pool in the background is for the spotted-necked otters; compared to the rest of their water space, it is relatively deeper, and it is the only part with underwater viewing. (I wonder if the swamp monkeys ever swim in this pool? I've seen them swimming in the water on the other side of the path, but to have underwater monkey viewing would be fantastic!)