How large is the world s biggest penguin? An adult emperor penguin can grow up to about 40 inches (102 cm) tall, which makes it about as tall as a six-year-old child! Emperor penguins live in the coldest place on earth Antarctica. To survive the extreme conditions, emperor penguins have a layer of feathers that are waterproof and windproof. They also have a thick layer of fat to help them stay warm. With all these layers, an adult male emperor penguin can weigh as much as 84 pounds (38 kg). That s one big bird! In Emperor Penguin: The World s Biggest Penguin, large color photos and grade-appropriate text will engage young readers as they learn about the natural habitat, physical characteristics, diet, life cycle, and behavior of this super-sized bird. A comparison diagram is also included to show readers the animal in relation to a familiar object.