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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ The most powerful bird in the world has a song as a pile driver

The most powerful bird in the world has a song as a pile driver



The pressure of sexual selection made peacocks gorgeous, tree shivers loud and birds of paradise great dancers. At first glance, the white bell tower does not seem to have benefited in a similar way. Breasted with barrels and big lips, long hair hanging from the tip of his beak, this rainforest bird looks more like a muppet than a Casanova bird.

But everyone has their own thing. According to a paper released Monday in Current Biology, this goofball boasts the most powerful bird songs ever made. And he should be proud of that because he sings the most piercing note right in the faces of potential friends.

The white bellflower – one of the four types of bells in South and Central America – is a favorite among birds in Brazil. It has a "weird, metallic, kind of alien call," said Cayo Brito, one of the founders of Brazilian bird experts. When they sing several at a time, they are "deafening" and sound like "several blacksmiths trying to compete," said Arthur Gomez, a biology student at São Paulo State University who contributed to the new research.

Mario Con-Haft, Curator of Birds at the National Institute for Amazonian Research in Brazil and one of the authors of the study regularly travels to poorly explored areas of tropical forests to study birds and other species. While traveling in 2017 to Serra do Apiaú, a peak in northeastern Brazil, he came across bells that tend to live at high altitudes. They are "the soundtrack of the mountain," he said. "You can hear them from a mile away."

At the top of the mountain, they measured two vocalizations made by the white bell: a longer, more complex song, and a shorter, more intense one.

The second type of white bellboy song is stronger than a jackmaker and approaches, "at its peak, the amplitude of a pile driver" – about 125 decibels, Dr. Podos said. This makes it three times more intense than the call of the screaming drones, the previous sound recorder.

The researchers also found a compromise between the length and the amplitude of the song – the more intense the peak of the song, the less time it lasted. "If sexual selection continues to push the song stronger and stronger, it will become shorter and shorter," says Dr. Podos.

This, along with the simplicity of the song, is in line with "a model of evolutionary commerce – deviations between the amplitude of the sound and the complexity of the song," says Gonzalo Cardozo, a researcher at the University of Porto who did not participate in this study.


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