Amazonian white bellbird's mating call the noisiest in world: Study

White bellbird has beaten record of its rainforest neighbor, screaming piha, for title of world's loudest bird. According to a study published on Monday, hair-raising screech of a male bellbird is at least nine decibels (dB) louder than that of a piha, volumes of which can be as high as 125 dB. bird which lives in mountains of rth-eastern Amazon emits deafening screech when looking for a mate. 

Biologist Jeff Podos at University of Massachusetts Amherst and Mario Cohn-Haft of Brazil's Instituto Nacional de Pesquisas da Amazonia described record-breaking finding in paper published in journal.

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Defeaning calls of a bird weighing half-a-pound

researchers said that its calls are so loud that y are intrigued about how white bellbird females listen at close range without damaging ir hearing. se birds weigh around half a pound and y are as big as doves. male species have a fleshy black wattle orned with white specks that fall from its beaks while females are green with dark streaks and wattle-less. Biologist Jeff Podos at University of Massachusetts Amherst, who along with Mario Cohn-Haft of Brazil's Instituto Nacional de Pesquisas da Amazonia recorded  loudest bird calls ever documented, said he was fortunate eugh to witness females join males on ir perches as y sang.

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Loudest songs in pursuit of love

He said that he ticed that male sing only ir loudest songs. It is still unclear why females voluntarily expose mselves to loud ise at such proximity, which often reaches peak levels of 113 dB. It is above human pain threshold and equivalent to a loud rock concert. scientists are also t sure if birds ever mated. scientists also used high-quality sound recorders and high-speed video to study how birds use ir anatomy to produce such loud levels of ise. It is comparatively louder than howler monkeys, or bison but t as loud as lions, elephants or whales, y observed. y also ticed that pitch of call fluctuates, birds' respiratory systems have a finite ability to control airflow and generate sound might be reason. y also said that y would place a natural anatomical limit on how loud bird could evolve to become through sexual selection or selection for traits that are vantous for reproduction.

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