Dippers on the Elwha | BirdNote

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BirdNote®

Dippers of the Elwha

Written by Todd Peterson

That is BirdNote.
In 2014, on the Olympic Peninsula in Washington State, the dams on the Elwha River had been eliminated. It was the most important elimination of its form in historical past. Because the river ran free once more, salmon from the Pacific had been in a position to spawn upstream for the primary time in 100 years – having a dramatic impression on American Dippers – full of life little river aspect birds.    
[Song of American Dipper]
Biologists with the Decrease Elwha Klallam Tribe, the Smithsonian Migratory Bird Heart and Ohio State College drew small samples of blood from dippers that they then launched unhurt. Evaluation of blood and feathers present that birds with entry to salmon have greater survival charges and the females have higher physique situation than these with no entry to the fish.  These dippers are additionally more likely to remain on their house territories, reasonably than expend power to forage extensively.  And they’re 20 instances extra prone to try elevating two broods in a season, a very powerful contributor to inhabitants progress.
So vitamins from spawned-out salmon and salmon eggs are giving the river’s ecosystem new vitality.
For BirdNote I’m Mary McCann.
Assist for BirdNote comes from the Cornell Lab of Ornithology, presenting its new “Bird Images” on-line course, that includes Melissa Groo. Be taught extra at academy.allaboutbirds.org.  
[Song of American Dipper] 
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Bird sounds supplied by The Macaulay Library of Pure Sounds on the Cornell Lab of Ornithology, Ithaca, New York. American Dipper [8992] recorded by R S Little
River atmosphere recorded by Chris Peterson. ‘Stream, Average’ Observe 18 Nature SFX recorded by Gordon Hempton at http://www.quietplanet.com
BirdNote’s theme music was composed and performed by Nancy Rumbel and John Kessler.
Producer: John Kessler
Government Producer: Dominic Black
© 2016 Tune In to Nature.org   Could 2018/2020 / September 2022   Narrator: Mary McCann

ID#                 AMDI-04

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