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Science Quickly

When the Bellbird Calls, You Know It

Science Quickly

Scientific American

Science

4.2639 Ratings

🗓️ 9 December 2019

⏱️ 3 minutes

🧾️ Download transcript

Summary

The white bellbird of the Amazon may be the loudest bird in the world.   Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

Understanding the human body is a team effort. That's where the Yachtel group comes in.

0:05.8

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

0:11.0

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

0:19.6

To learn more about Yachtolt, visit yawcult.co.j.p.

0:23.9

That's y-A-K-U-L-T dot-C-O-J-P.

0:28.4

When it comes to a guide for your gut, count on Yacolt.

0:34.1

This is Scientific American 60-second science.

0:38.9

I'm Aline Ogenbrun. I'm Aline Ogenbron.

0:47.2

That incredibly loud song soaring over quieter birds in the Amazon rainforest belongs to the male white bellbird. At 125 decibels, his short but startling songs are louder than a jackhammer.

0:57.8

The white bellbird may be the loudest bird in the world.

1:01.0

These birds are making extraordinarily loud noises,

1:04.4

noises that are so loud that they would be harmful to our hearing if you had to hear them up close.

1:10.5

Mario Cohn-Haft, curator of birds at

1:12.8

Instituto Nacional de Pesquistas de Amazonia. He and his colleague Jeffrey Podos recorded the birds

1:19.0

in their natural habitat. Their findings are in the journal Current Biology. Birds like the screaming

1:25.3

pija or Molokin Cacotoo have also laid claim to the loudness title.

1:29.7

But the researchers think the new study has better instrumentation and data than most studies previously published in the scientific literature.

1:37.1

Loud sounds are usually for long-distance communication, and then when the listener, or the potential listener, is up close, the volume is dropped way back down

1:45.7

so that nobody needs to call a lot of attention to themselves or blow out each other's hearing.

1:50.3

But in the case of the white belbird, the opposite seems to be true. The loudest sound they make is

1:54.7

actually reserved for courting a female. When the female comes in close, they just switch to their

2:00.5

loudest sound

...

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