One of the most frequently asked questions about yaks is "What do they sound like?" In this video, a young Royal yak mom talks to her newborn calf. The vocalizations bond the two in the herd. As the calves grow, you can definitely hear the moms call their calves as well as the calves answering their moms. These are typical yak sounds. Yaks in general are quite animals even at weaning time. Adults will grunt a bit to communicate with each other. Some even learn to rudely request treats with grunts.