I-yak okanye i-jak yinkunzi yenkomo eneenwele ezinde yosapho lwenyathi. Ihlala kumbindi weAsia, ngakumbi kwiiHimalaya. Igama livela kulwimi lwaseTibet. Isilwanyana sikwabizwa ngokuba yinkomo yenkomo yaseTibetan.
Uninzi lweeyaks zifuywa kwaye zingamafama okanye abahambi. Iiyaks ezimbalwa ezisendle zisengozini yokuphela. Iinkunzi zingaphezu kweemitha ezimbini ubude endle, zilinganiswa ukusuka emhlabeni ukuya emagxeni. Iiyaks ezifama ziphantse zibe sisiqingatha sobude.
Uboya be-yak bude kwaye bukhulu. Le yeyona ndlela ilungileyo yokuba bafudumale kuba bahlala ezintabeni apho kubanda. Ezinye iinkomo zazingenakukwazi ukuphila apho.
Abantu bagcina iiyaks zoboya kunye nobisi. Basebenzisa uboya ukwenza iimpahla kunye neentente. Iiyaks zinokuthwala imithwalo enzima kwaye zitsale iinqwelo. Yiyo loo nto zikwasetyenziselwa umsebenzi wasendle. Emva kokuxhela, banika inyama, kwaye ufele lwenziwa ngofele. Kwakhona, abantu batshisa ubulongwe beeyak ukuze babafudumeze okanye bapheke okuthile emlilweni. Ubulongwe budla ngokuba kuphela kwepetroli abantu abanayo apho. Akusekho mithi phezulu ezintabeni;