Life is hard, and mammals need their z's to slog through it. But do you know how many hours of sleep, on average, different species of mammals require?

Below are 12 boxes containing icons that represent the eyes of different mammals. Match each mammal eye to the appropriate number representing the average hours an adult sleeps in a day by dragging and dropping the icon into the square above the number you think is correct. When you have placed all 12 icons, correct answers will be outlined in green and incorrect answers in red. Continue to shift around incorrect answers until all are correct.