the size doesn't matter. there thick coat of feathers and blubber keeps them warm
by huddling they sharing their body heat
Penguins stay close in winter, because they want to stay warm. The question tells the answer.
to stay warm. =D
Penguins are warm-blooded animals, which means they can regulate their body temperature internally. They have adaptations like thick layers of feathers and blubber to help them stay warm in their cold Antarctic environments.
The feathers are not water proof because it is only there blubber wich keeps them warm
They huddle together for warmth.
Dolphins have blubber layers that keep their internal temperatures warm. Penguins have different layers of feathers, the first layer is a soft down layer to stay warm, and the outerlayer is water resistant.
They use air conditioning and blankets.
a long time
To keep warm and not freeze.
to keep them warm
Penguins stay in groups, not only to stay warm via each others' body heat, but to reduce the risk of being attacked. this intimidates the prey, or if that doesn't work, they can disperse, confusing the attacking animal and making it hard to focus only on one penguin.