Special anatomical, physiological
or behavioral adaptations:

Jaguars have jaws and a large head especially equipped for piecing the skull of their prey with their canines. They are the only big cats which practice this habit. Unlike other large cats, who attack at the neck, jaguars often kill their prey with a single bite to the back of the head. They are called "occipital crunchers."

They are primarily nocturnal with activity levels high at dawn and dusk. Jaguars are exceptional swimmers to accommodate their living style. Because they may live in rain forests and flooded swamp areas this adaptation comes in handy when trying to cool off or catch food. Jaguars are the only "roaring" cat which also makes them unique from other large cats.