Which penguin is the tallest species?

The emperor penguin is the tallest living penguin species. Adults usually measure about 110–120 centimeters from bill to tail and are also the heaviest penguins, commonly weighing between 22 and 45 kilograms.

Its great size helps it survive Antarctica’s severe conditions by reducing heat loss. Dense feathers, a thick layer of fat, and a compact body conserve warmth. Emperor penguins also dive exceptionally deeply, reaching about 535 meters and sometimes remaining underwater for roughly 20 minutes while hunting fish, squid, and crustaceans.

A famous part of the species’ life cycle is its winter breeding season. The female lays one egg, then the male balances it on his feet beneath a warm fold of skin for more than two months while fasting in the cold. Adults gather tightly in huddles to share warmth.

The king penguin is a common mix-up because it is also large and belongs to the same genus, Aptenodytes. However, the emperor penguin is both taller and heavier.