Golden Yak

The golden color of these Yaks comes from a recessive gene found in very few of this species animals. This is what makes them valuable, special, and of course rare. As of 2008 there are known to exist less than 50 adult Golden Yaks in all of North America. The yak, Bos grunniens or Bos mutus, is a long-haired bovine found throughout the Himalayan region of south Central Asia, the Tibetan Plateau and as far north as Mongolia and Russia. In addition to a large domestic population, there is a small, vulnerable wild yak population. In the 1990s, a concerted effort was undertaken to help save the wild yak population. The English word "yak" derives from the Tibetan (Tibetan: Wylie: g.yag), or gyag – in Tibetan this refers only to the male of the species, the female being called a dri or nak. In English, as in most other languages which have borrowed the word, "yak" is usually used for both sexes.

http://en.wikipedia.org/wiki/Yak