As was typical of Hollywood B movies, the crocodiles are alligators.
The leopard that fights with the water buffalo is actually a jaguar, which are not found anywhere in Africa. They are native to South and Central America, but are often used because they live closer to Hollywood, and are easier to catch and train for stunt work than leopards.
One of the standard jungle sound effects used is the call of a peacock - a species not native to African jungles, but India. Also present are Indian elephants, and of course a black panther, which is not indigenous to Africa.
Some shots reveal that the "natives" are wearing dark briefs under their loincloths to prevent any possible violation of the strict Production Code.
When the buffalo and leopard fight, the audio is rather interesting, The buff does an impersonating of a mooing cow and the leopard produces a very convincing impression of a snarling dog.
Bomba was under the tutelage of Cody Casson from the time he was two years old until he was seven when Casson died, but in those five years he was never taught how to use prepositions and speak proper English in complete sentences.