Hoff, Mary King

Full-color illustrated photographs describe the characteristics and life of penguins, where they live, how they care for their young, and their relationship with other animals.

Full-color illustrated photographs describes crocodiles, their habitat, what they eat, how they raise their young, and other interesting facts about them.

Describes various examples of symbiosis, the elaborate give-and-take of food, shelter, and other essentials of life that goes on between different kinds of animals and plants.

Describes the variety of ways in which animals cope with a cold environment, from antifreeze created by trees to the hibernation of squirrels.