Listen close! There is some interesting elephant behavior in this quick clip. Mother elephant Semba walks by, but her young calf Penzi doesn't follow. Turn your sound on to hear Semba emit a low rumbling sound from off-camera, which makes Penzi rush over to mom!
Elephants can make a variety of sounds to communicate different things, and these deep rumbles are one of the most fascinating ways elephants communicate. The rumbles can be so deep in tone that elephants can even "hear" them as vibrations through the ground!