Weight 15 to 35 lbs. Pointed, black tips, ear tufts Biology Mountain lions are mainly nocturnal, preferring to hunt at night. Deer are their favorite prey. They have also been known to prey on beaver, porcupines, rabbits, skunks, domestic livestock, pets, and other small mammals, birds, and even fish. Larger animals are usually killed by a bite to the back of the neck.
Lions usually remove the viscera and eat the heart, liver, and lungs first.
These food sources are generally fed upon until consumed or they spoil. Lions generally move the carcass and re-cover it after each feeding. Male lions roam widely, females less widely, especially when the cubs are small. Adult male home ranges often encompass more than 100 square miles. Adult males use their hind feet to scrape duff into a small pile to declare their territory.