Thaum siv cov neeg siv khoom-qhia txog cov neeg siv lub tswv yim zoo, peb ib txwm tsim cov khoom siv ntau dua, peb nquag muaj cov khoom siv roj av zoo nkauj, peb nquag muab cov khoom siv hluav taws xob zoo nkauj Ua neej nyob los ntawm cov khoom zoo, txhim kho keeb kwm qiv nyiaj yog peb txoj kev taug qab mus ib txhis, peb tuaj xyuas peb yuav dhau los ua kev tuaj xyuas peb yuav ua haujlwm ntev. Cov khoom yuav muab rau thoob plaws ntiaj teb, xws li Tebchaws Europe, Ethiopia, Turkmenistan.