Ah, feathers. A beautiful thing, they are. They provide insulation by heat by trapping heat. If a bird is cold, it will generally fluff up it's feathers in order to capture heat. If it's cold, it'll slick them down to get rid of excess heat.
Because all birds live in different environments and weather conditions. ------------------------------------------------------------------------------------- Birds feathers have evolved to serve a number of purposes, the most important of which are warmth and flight. The feathers need for warmth have to be small, soft and fluffy while the feathers needed for flight have to be large, strong and sleek.
For warmth.
for flying and warmth
thick feathers for warmth and white feathers for camouflage
Countour feathers and down feathers
It Provides warmth..and allows the bird to fly
contour feathers,flight feathers,primary feathers and secondary feathers
protection and warmth at night, and the ability to fly
It is needed for warmth. :)
I believe that they do this simply to keep warmth on their bodies while they are sleeping.
Down feathers are tightly packed feathers found under the outer feathers of birds. They provide excellent insulation and warmth due to their ability to trap air close to the body. Down feathers are commonly used as insulation in bedding and winter clothing.
Yes, chickens have down feathers. Down feathers are soft and fluffy feathers found close to a bird's skin, providing insulation and warmth. Chickens use these down feathers to regulate their body temperature and keep themselves warm.