Flyin’ within the Rain | BirdNote

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BirdNote®  

Flyin’ within the Rain

Written by Bob Sundstrom
 
That is BirdNote.

[Sounds of a rainstorm]

Throughout a rainstorm, you’re extra prone to see birds perched and hunkered down than flying round. Most birds are largely waterproof. Their feathers, mixed with oil from preen glands*, preserve them fairly watertight.

So why do birds keep away from flying throughout rainstorms? It’s not nearly getting moist. It could have extra to do with the air than with the water. [Sounds of a rainstorm]

Storms alter the medium during which flight takes place: the air itself. Rainstorms are likely to happen when atmospheric strain is low. Air in a low-pressure system is much less dense. But it surely’s dense air that offers birds the aerodynamic carry they should take to the air. Falling rain and excessive humidity additionally add a number of water molecules to the air. That water takes up house within the air, making it even much less dense.

So reasonably than fly, many birds perch and preserve power throughout a storm. They sit it out below the quilt of a tree. Or perch on a fence wire dealing with into the wind, decreasing their air resistance — and limiting the lack of treasured physique warmth.

However when the storm passes, birds as soon as once more take to the skies.

For BirdNote, I’m Mary McCann.

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* The feathers zip collectively like Velcro. This was found in analysis achieved on cleansing oiled birds. The preen gland helps to situation feathers and preserve them supple.

Bird sounds offered by The Macaulay Library of Pure Sounds on the Cornell Lab of Ornithology, Ithaca, New York. #16 Thunderstorm Nature Sound Necessities and #47 Deciduous Forest Morning recorded by Gordon Hempton.
BirdNote’s theme music was composed and performed by Nancy Rumbel and John Kessler.
Producer: John Kessler
Managing Producer: Jason Saul
Affiliate Producer: Ellen Blackstone

© 2017 Tune In to Nature.org   July/August 2017/2019  June 2022 Narrator: Mary McCann
 
ID#    flight-13-2017-07-14    flight-13
Script primarily from this supply: http://ornithology.com/birds-flying-in-the-rain

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