They have lots of fat.
Most clothing is not a good conductor of heat, because one of the purposes of clothing is to reduce the energy input required maintain the human body at a constant temperature. Clothing that is a good conductor of heat would frustrate this purpose.
your body is a good conductor because it has to have heat
a fleece traps a layer of air which is a insulator of heat. it reduces heat loss via conduction and convection.
Well ... it's not. If hair were a good conductor of heat, it would make a lousy insulator for the body - which is one of it's primary functions. Consider outdoor dogs and cats during the winter ... their fur thickens to retain body heat as much as possible. It does conduct "some" heat - but not very much.
because your body is warm, it reflects your heat back ;)
Like other birds, they will suffer and eventually die if they can not maintain their necessary body heat.
Shivering when wet is the body's attempt to maintain body heat. A wet body loses heat quickly. Failing to maintain body heat will result in hypothermia.
Because the group of animals called amphibians do some things that penguins can't. Amphibians can breathe through the skin, which penguins can't. Penguins can - and need to - maintain body heat, while amphibians will happily take on the ambient temperature.
type it up on google
skin
their body heat and their thick layer of fethers
by huddling they sharing their body heat
Most clothing is not a good conductor of heat, because one of the purposes of clothing is to reduce the energy input required maintain the human body at a constant temperature. Clothing that is a good conductor of heat would frustrate this purpose.
In the same way that all mammals maintain their body heat - by burning calories digested from their food.
your body is a good conductor because it has to have heat
They do it to conserve and share body heat.
sweat is used to cool down the body