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science

High-altitude birds evolved feathers with more fluffy down

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A study of 250 species of Himalayan songbirds has revealed how their feathers evolved for higher altitudes.

The insight reveals how feathers provide the tiniest birds with such efficient protection from extreme cold.

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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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"It was -10C," said the researcher from the Smithsonian National Museum of Natural History, in Washington DC. "And there was this little bird, a goldcrest, which weighs about the same as a teaspoon of sugar. "To survive, this bird has to keep its heart at about 40C," he said."I was like, 'OK, I really need to understand how feathers work.'"

Examining the feathers of nearly 2,000 individual birds, in microscopic detail, he noticed a pattern linked their structure to their habitat.

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And Dr Barve's measurements revealed those living at higher elevations had more of the lower fluffy down.

"They had fluffier jackets," he said.

https://www.bbc.com/news/science-environment-56072590

Edited by FfFfFfFF
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monster4life231

Amazing! Thank you for sharing :) 

spread peace - #MJInnocent

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Stupid Oreo

birbs

how do you piss lady gaga off? poke her face
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Economy
20 hours ago, BlueRose said:

I lovebirds 

 

21 hours ago, Stupid Oreo said:

birbs

Birdssssss. Lets be bird lovers

 

black friday thanksgiving GIF by NBC

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BlueRose
15 minutes ago, Economy said:

 

Birdssssss. Lets be bird lovers

 

black friday thanksgiving GIF by NBC

;p I don't 

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Economy
10 minutes ago, BlueRose said:

;p I don't 

Dina will kill u if she hears that :duck:

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PlasticWeave

omg they're so cuute

poordat

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