#1. Most human beings are awake during the day and sleep all night. Owls live the opposite way. Owls are nocturnal. This means that they sleep all day and stay awake at night. Because owls are nocturnal, this means they must eat at night. But finding food in the dark is difficult. To help them, they have special eyes and ears. In this paragraph, we learn that “Owls are nocturnal.” The word diurnal is the opposite of the word nocturnal. Using information in the passage as a guide, we can understand that an animal that is diurnal.