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High-altitude birds evolved thicker ‘jackets’
By Victoria Gill
Science correspondent, BBC News
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.
The study, in the journal Ecography, was inspired by a tiny bird lead researcher Dr Sahas Barve saw during an icy day of fieldwork in the Himalayas, in 2014.
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High-altitude birds evolved thicker ‘jackets’ By Victoria GillScience correspondent, BBC News A study of 250 species of Himalayan songbirds has revealed how
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