How do emperor penguins breed?
Emperor penguins have the most extreme breeding cycle of any bird. They trek 50 to 120 km over sea ice in autumn to reach their breeding colonies. After the female lays a single egg, she transfers it to the male and returns to the sea to feed. The male then incubates the egg on his feet under a warm brood pouch for over two months, fasting throughout the Antarctic winter in temperatures that can drop below minus 40 degrees Celsius. Males lose around 12 kg during this fast. When the chick hatches, the male feeds it with a secretion from his esophagus until the female returns with a crop full of fish.
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Where this answer comes from
Reference bodies behind our behavior answers. Links last checked August 5, 2026.
- Smithsonian Ocean Portal - Penguin biology, anatomy, and breeding explainers.
- British Antarctic Survey - Antarctic penguin ecology, diving, and sea-ice context.
- Penguins International - Species explainers and conservation context focused on penguins.