November 20, 2019 | 5:39 PM IST
white bellbird

Little white-bellbirds are world’s loudest birds at 113 decibels

The white bellbird, found in the deep Amazon forest, on Monday became the world’s loudest bird with peak levels reaching 113 decibels. The report has been published in the Current Biology journal.
What is more intriguing is the fact that these dove-sized birds weight just about 250 grams and the research team is trying to figure out how such small birds could manage to get so loud.
Biologist Jeff Podos at the Univesity of Massachusetts Amherst and Mario Cohn-Haft of Brazil’s Instituto Nacional de Pesquisas da Amazonia said that when male birds make the mating call, it is so loud that they wondered how white bellbird females listen to it at so close proximity without hurting their hearing system. 
On the contrary, the females often join the males on their perches as they sing. The authors added that the male bellbirds have a fleshy black wattle with white specks hanging from their beaks and are thus, easy to identify.
The researchers used high-quality sound recorders and high-speed video to study how the birds use their anatomy to achieve such high levels of noise. They said that the 113 decibels are equivalent to a loud rock concert or a turbo-prop plane 200 feet away achieving a takeoff power and beyond the human pain threshold.

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