Top 10 Facts About Emperor Penguins

In the harsh, icy wilderness of Antarctica, emperor penguins stand as iconic symbols of resilience and adaptation. These majestic birds have evolved to thrive in one of the most extreme environments on Earth, boasting remarkable traits and behaviors that set them apart. Below are 10 fascinating facts that shed light on the secret lives of these Antarctic giants.

1. Ice, Ice, Baby

Wild emperor penguins are found exclusively in Antarctica. They primarily breed and raise their young on "fast ice"—a floating frozen ocean platform connected to land or ice shelves. From birth, their entire lives are intertwined with the Antarctic ice and its surrounding waters, though rare vagrant individuals have occasionally been spotted off the coast of New Zealand.

2. Giants of the Penguin World

Emperor penguins are the largest among the 18 living penguin species and rank among the biggest birds on the planet. They stand roughly 120cm tall—about the height of a six-year-old child—and weigh around 40kg, though their weight fluctuates dramatically throughout the year.

Yet they would be dwarfed by ancient "mega-penguins." Fossils uncovered on the Antarctic Peninsula reveal that a colossal penguin species, which lived approximately 37 million years ago, may have stood 2m tall and weighed as much as 115kg.

3. How Many Penguins?

Emperor penguins are the least common Antarctic penguin species, with global population estimates ranging from 265,500 to 278,500 breeding pairs. Research in Antarctica is being funded because the more we learn about these creatures, the better we can protect them. This knowledge will help promote the establishment of Marine Protected Areas and safeguard the species amid climate change.

4. Penguins from Space

Emperor penguin colonies have been discovered and counted from space. Over the past 15 years, scientists from the British Antarctic Survey (BAS) have searched satellite imagery for guano stains on the ice to locate new colonies. This method has led to the discovery of numerous previously unvisited colonies and enabled the counting of every individual penguin. Today, 66 emperor penguin colonies are known around Antarctica’s coastline, with exactly half identified via satellite imagery.

5. Penguin Love

Emperor penguins incubate their eggs during the long, dark southern winter months. Their courtship displays are intricate, but copulation is brief, and females lay a single egg in May or June. After laying the egg, she passes it to her mate for incubation and departs—spending the next nine weeks at sea feeding.

The male carefully balances the egg on his feet for 65 to 75 days, keeping it warm in a specially adapted brood pouch and off the snow, until it hatches into a fluffy chick.

6. ‘Baby, It’s Cold Outside’

Emperor penguins are uniquely adapted to survive Antarctica’s harsh conditions, where temperatures can plummet to a bone-chilling -50°C and winds reach up to 200km/hr. They have two layers of feathers, a substantial fat reserve, and proportionally smaller beaks and flippers than other penguins to minimize heat loss. They even have feathers on their legs to keep their ankles from getting too cold.

Their feet are also adapted to icy environments, containing special fats that prevent freezing and strong claws for gripping the ice. Most remarkably, colonies of adults and chicks work together to huddle for warmth. Tightly packed groups of 5,000 or more individuals shuffle around, ensuring each takes a turn—not too long—on the cold outer edge of the huddle. This behavior stands in stark contrast to their quarrelsome, territorial neighbors, the Adélie penguins.

7. Dive, Dive, Dive!

Emperor penguins are the Olympic divers of the bird world. The deepest recorded dive is 564m—that’s nearly twice the height of the Shard, Europe’s tallest building. The longest recorded dive lasts almost 32 minutes, an incredible achievement for any bird.

8. Fish Suppers

Emperor penguins feed mainly on Antarctic silverfish, as well as other fish species, krill (like Will & Bill from Happy Feet), and some squid. An adult penguin eats about 2–3kg per day, but on a good feeding day, they can consume twice that amount to build up body fat reserves for the long winter or to feed their chicks.

9. …and Crash Diets

Male emperor penguins will not eat for up to four months, from the time they arrive at the colony to breed until the egg hatches and the mother returns to feed. They lose nearly half their body weight during this period, relying entirely on the fat reserves built up during summer feeding to survive the long winter.

10. Vertical Limits

Emperor penguins can climb steep ice cliffs and have been known to breed on ice shelves if the sea ice below fails. In 2013, British and Australian scientists discovered two emperor penguin colonies on ice shelves at Barrier Bay and Larsen C, along with two temporary colonies on the Shackleton and Nickerson ice shelves. This may be a useful adaptation as Antarctica warms due to climate change, but it might not be sufficient in the long term if the rapid rate of warming continues.