The kit fox is nocturnal, but they are known to come out on cloudy days from time to time. During the day, they stay in their dens to keep out of the heat. A kit fox will grow up to 20 inches (6 crayons) in length and weigh around five pounds. They have hair between their toes which helps them get more traction on the sand. This adaptation helps them to move fast and catch their prey. In the desert, there is very little access to running water. The kit fox gets all the moisture it needs from the food it eats instead of drinking. While it prefers small mammals such as mice, the kit fox will also eat lizards.