To survive, animals need to find food. Some predators have developed special vision in order to look for prey. Processing eyesight that can be four to five times ＿＿（26）＿＿ than ours, eagles can spot a rabbit from several miles away. Owls, 27 hunt at night, have huge eyes for capturing plenty of light and detecting tasty treats in the dark. Like owls, cats see well at night. Their pupils become large circles to let more 28 in. However, they can't detect colors. Bees and butterflies, on the other hand, have a range of color vision that extends into ultraviolet – 29 that humans can't see. For a long time, humans didn't know how other animals see. Recent studies have shed light on a marvelous world of vision diversity. Understanding the way animals 30 the world can tell us a lot about their survival strategies.