Penguins are known for incredible journeys to find food for their young. While males guard the eggs or chicks, females swim enormous distances to catch squid, krill, and other small marine animals.
Emperor penguins, for example, can travel up to 100 kilometers (60 miles) a day to find open water. On average, they cover about 1,000 kilometers (620 miles) over foraging trips lasting two to three months.
In 2015, researchers recorded the furthest journey by a breeding female. A bird named HB42 left her Antarctic colony and swam to South Georgia, about 2,000 kilometers (1,240 miles) away.