Llamas live in high altitude places, such as the Andean Mountains, and have adapted a high hemoglobin content in their bloodstream. Instead of circular, their red blood cells are oval shaped, which helps them to survive in environments where there is little oxygen.
Llamas have unique feet. Instead of hooves, each foot has two huge toenails with broad leathery pads that enable them to navigate a variety of terrain. Their soft and leathery soles cause less ecological impact. The llamas' thick coats protect them from wind, snow and rain, and also prevent animal bites. While llamas often spit at each other as a form of self defense, some spit at humans if they have been mishandled.