Yaks

The Mongolian word for female yak is "us."

Yaks have horns as a means of defense against predators and for competing with other yaks, mainly during mating season. The horns also serve as a tool to help them dig through snow to access food during harsh winter conditions.

Yaks are not buffalos, in scientific classification they are classed as mammals and belong to the bovidae family. After that there are sufficient differences to make each animal belong to its own scientific group

Yes. Farmers raising Yaks in Tibet depend upon Yak milk for a portion of their diet.

A yak's predators include wolves, tigers and bears.

camel

A Himalayan yak lives in Himalayan mountains.

no!

Yaks are located near the gates of the village on Neitiznot. To get there talk to Maria Gunnars on the northernmost dock in Relleka. You need to have at least gotten to the Neitiznot part of The Fremminik Isles.

Yak wool is cleaned, carded and spun from yak fleece.

to use your description, it is an ox like thing. They are related to cattle but may be more closely related to Bison

Thery are herbivores eating grasses, herbs and lichens

They are the "same" by the fact that they belong in the same Family being Bovidae. However, more specifically, yaks and water buffalo are not the same, actually. Yak and water buffalo are two distinct species of bovids. One lives in Nepal and Mongolia, the other is found in the south and east regions of Asia, like in Taiwan and India.

The wild yak was once numerous and widespread on the entire Tibetan plateau north of the Himalayas. Currently it is found in remote areas of the Tibetan plateau and adjacent highlands, including Gansu Province, China, with a few having been observed in the Chang Chenmo Valley of Ladakh (eastern Kashmir, India).

Yaks are very hairy creatures, with very long hair and a large hump over their shoulders. Water buffalo have very short hair, long horns that splay towards their back, and quite a bit larger than a yak. Water buffalo are found in the tropics, whereas yaks are found in the cold mountainous regions of Nepal and Mongolia.

in the Himalayan mountains.

domestic herds are numerous although wild Yaks are in decline

The Himalayan region of Central Asia, Mongolia and the Tibetan Plateau

with their horns

A dzo is a male hybrid of a yak and a domesticated cow. A female offspring is known as a dzomo or zhom. In Mongolian it is called hainag. Alternative Tibetan spellings in English include zho and zo.
Calf/calves

Zebras learn to behave in the wilderness without adult supervision.

The yak, Bos grunniens, 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.

a hairy cattle

In general the Yak is in decline and may be considered endangered