To feed on fish
Emperor penguins do not hibernate. They remain active throughout the year, even in the harsh Antarctic winter when temperatures drop below freezing. They rely on each other for warmth and take turns moving to the center of the huddle to stay warm.
Macaroni Penguins are in fact more numerous than Emperor Penguins.
Emperor penguins in Antarctica can go without sunlight for about two months during the winter.
They huddle to keep each other warm during the winter
No. There are thousands of species of birds. Many birds do last the winter. For example, penguins, cardinals, blue jays.
The emperor penguin is the only penguin that breeds during the winter in Antarctica.
Penguins do not hibernate, but they do migrate <<
Penguins live on land but almost half of the year females go into the sea to hunt for food.
Emperor penguins can have up to four layers of fat to help insulate and protect them from the extreme cold of their Antarctic habitat. These layers of fat provide essential insulation and energy reserves for the penguins during the harsh winter months.
Antarctica is not so bad in the summer. With the constant sunlight you get large plankton blooms which feeds whales and fish. The fish can then be eaten by bigger fish, birds and penguins. Most animals do not stay in Antarctica over the winter. Instead they migrate north to South America or the Arctic (among other places). Those that do stay (like male Emperor Penguins with their eggs) often do not eat at all over the winter.
because they try to save up and don't leave in the cold winter
Butterflies tend to fly during daylight hours when the migrate. Therefore when butterflies migrate for the winter they most likely start their journey around sun up and end before sunset.