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© Instagram sarahfraisou.paris Sarah Fraisou victim of a scam: she gives a big rant and promises to find the culprit! This Tuesday July 7, Sarah Fraisou revealed on her Snapchat account that she was, in spite of herself, at the heart of a big scam. She yelled and assured that she would find the culprit. Who rubs it pricks! Sarah Fraisou discovered that she was, despite herself, at the heart of a big scam.
WASHINGTON (AP) — Perched on a flowering shrub on a windy Andean mountainside, the tiny Ecuadorian Hillstar hummingbird chirps songs of seduction that only another bird of its kind can hear. © Provided by Associated Press This 2018 photo provided by Paolo David Escobar shows a male Hillstar hummingbird perched on a Chuquiraga jussieui flower in Ecuador. A study released on Friday, July 17, 2020 finds that the species of hummingbirds can sing and hear frequencies beyond the range of other birds. The unusually high-pitched songs may help the birds woo above background noises in their windy, mountain environment. (Paolo David Escobar/Neoselva Photography via AP) © Provided by Associated Press This 2019 photo provided by researcher Fernanda G. Duque shows a male Hillstar hummingbird singing a high frequency song perched on a Chuquiraga jussieui flower in Ecuador. A study released on Friday, July 17, 2020 finds that the species of hummingbirds can sing and hear frequencies beyond the range of other birds. The unusually high-pitched songs may help the birds woo above background noises in their windy, mountain environment. (Fernanda G. Duque/Georgia State University via AP)
As the male sings, he inflates his throat, causing iridescent throat feathers to glisten princely purple. The female may join in a courtship dance – or chase him off.
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For the first time, scientists have shown that these hummingbirds can sing and hear in pitches beyond the known range of other birds, according to research published Friday in the journal Science Advances.
The male’s ballad is sung at around 13.4 kilohertz. That's considered “ultrasonic” for birds, which generally can’t hear above 9 or 10 kilohertz.
“Something very interesting is going on in the ears of these hummingbirds to allow them to hear such sounds," said Christopher Clark, a biologist at the University of California, Riverside, who was not involved in the study.
“That's just an incredibly high pitch for a bird.”
Tocotronic: "Sag alles ab" - Show with unpublished songs
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Among birds, only some owls have previously been shown to hear ultrasonic sounds — which they use to locate prey, but not to communicate. Biologists have studied other hummingbird species in South America that make high-pitched sounds, but it’s been difficult to confirm whether those birds also hear the sounds. © Provided by Associated Press This 2019 photo provided by Paolo David Escobar shows a male Hillstar hummingbird perched on a Chuquiraga jussieui flower in Ecuador. A study released on Friday, July 17, 2020 finds that the species of hummingbirds can sing and hear frequencies beyond the range of other birds. The unusually high-pitched songs may help the birds woo above background noises in their windy, mountain environment. (Paolo David Escobar/Neoselva Photography via AP)
For the new study, scientists climbed into the Ecuadorian Andes to reach high grasslands called paramos and locate the Hillstars’ breeding grounds. There they recorded the males singing, then played back their romantic ballads to test the reactions of other birds.
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Other Hillstars craned their necks and turned toward the speaker as it played the high-pitched chirps; one also flew over the speaker to inspect it. In the lab, the scientists verified that the part of the brain typically engaged in auditory communication had been activated.
“We confirmed that this song has a social function,” said Fernanda Duque, a study co-author at Georgia State University, where she researches hummingbird brains.
Mammals generally hear a wider range of pitches than birds. Humans can hear pitches up to about 20 kilohertz, but lose sensitivity to high-pitch sounds with age.
During fieldwork, the younger scientists could usually hear the Hillstar hummingbird songs, but the older participants couldn’t, Duque said.
The researchers believe the birds may have evolved to sing at high pitches so that their love songs wouldn’t compete with background noises in their environment, such as mountain winds, streams and the songs of other birds, said Marco Monteros, a study co-author and biologist at Universidad Técnica del Norte in Ibarra, Ecuador.
“For some hummingbirds, it’s like a private channel of communication — other bird species don’t use these high-frequency sounds,” said Timothy Wright, a behavioral ecologist at New Mexico State University, who was not involved in the study.
Follow Larson on Twitter: @larsonchristina
The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education. The AP is solely responsible for all content.
WikiLeaks: 10 years later, Julian Assange's fate is more uncertain than ever .
© REUTERS / Peter Nicholls / Foto de archivo Julian Assange, founder of WikiLeaks, on the balcony of the Ecuadorian embassy in London, the May 19, 2017. Ten years ago to the day on July 25, the WikiLeaks site published tens of thousands of confidential documents which revealed, among other things, the mistakes and crimes committed by the American army in Afghanistan. For just over a year, WikiLeaks founder Julian Assange has been held in a prison on the outskirts of London.