Simplify the following text for a Grade 6 native English-speaking person.
Original: The argali , or the mountain sheep ( species Ovis ammon ) is a wild sheep , which roams the highlands of Central Asia ( Himalaya , Tibet , Altay ) .
Simplified: The argali or mountain sheep ( Ovis ammon ) is a wild sheep . It lives in the highlands of Central Asia ( Himalaya , Tibet , Altay ) .