sleep behavior in animals

Describes how different types of marine mammals, including bottlenose dolphins, manatees, and harbor seals, sleep in the oceans.

Describes the different methods of sleep of a variety of mammals, fish, insects, and birds. Includes such details as postures of sleep, location, duration, and special adaptation to habitat.

Explanatory text and photographs examine the ways different animals sleep, when they sleep, and where.

Illustrations and easy-to-follow text introduces the ways that animals sleep to early readers, and features pigs, bears, kittens, penguins, rabbits, puppies, and bats.

Rhyming verses followed by factual information briefly describe the sleep habits of a variety of animals.