Unfortunately there's comparitively few of them left in the wild. There's plenty of domesticated Yaks, though. Yaks are unable to moo, so if you are in Tibet and meet a Yak and it moos, it's not a Yak, but a very lost Highland Cow. Yaks are even-toed ungulates. If you dream about a yak, it represents uniqueness and reliability, depending on the symbolic associations. You can depend on a Yak, but only above 3,500 meters over sea level. There is even a Yak economy (pdf file). Rogue Yak Joke punchline (fill in the rest of the joke): "I forgot to tell you, Sahib, the Yak also likes to sit on fish."
A Yak Thread Yaks are very interesting animals, they are a woolly form of wild ox or something, and appear to wear very large brown shag pile rugs.