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.
Penguins stay close in winter, because they want to stay warm. The question tells the answer.
to stay warm. =D
They huddle together for warmth.
Dolphins are mammals, while penguins are birds.
They use air conditioning and blankets.
a long time
To keep warm and not freeze.
dolphins are probably smarter than penguins. Dolphins are 1 of the smartest animals.
By putting a coat on and wrapping up in blankets :):):):):):)
by huddling they sharing their body heat
To stay warm when left behind.
Penguins do not build homes or a nest. They stay in the open and huddle together to keep warm. The outermost rotate inwards as the mass of penguins move to keep warm.