How do cougars behave at home and do cougars have big eyes and why?

At home, cougars are typically solitary and territorial, often establishing a large home range that they patrol. They are primarily crepuscular, being most active during dawn and dusk, and they exhibit stealthy behavior when hunting. Cougars do have relatively large eyes, which enhance their night vision, allowing them to see better in low-light conditions, a beneficial trait for a predator that hunts at twilight.