During the trek to the village, Joey is seen wearing some type of footwear while climbing the rock face. After they get near the top, he is barefoot and remains this way for the remainder of the film.
Fake crocodiles that approach the shore when the natives use the boys, including Joey, as bait. They are also fake later on when a man is eaten by one after he falls off the raft.
As in many of the Tarzan films, forest deer & fawns are shown in the wild. Those are, however, not native to Africa.