High Altitude Birds Develop Down Jacket

Birds that live in high altitude or higher places study says tend to develop like down jackets that is thick in order to survive the cold weather.

According to the study birds that live in cold environment tends to be full of feathers or feather rich to protect and insulate their body from cold environment.

“A study of 250 species of Himalayan songbirds has revealed how their feathers evolved for higher altitudes. The birds in colder, more elevated environments had feathers with more fluffy down - providing them with thicker "jackets". The insight reveals how feathers provide the tiniest birds with such efficient protection from extreme cold. It also provides clues about which species are most at risk from climate change, the scientists say.”(BBC)

The main point : Birds that live in higher cold places tends to develop a thick jacket through their feathers in order to adapt in their environment.