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I wouldn't guess it was a bird either. Definitely different and certainly compelling, it would sure get attention. To me that sound is reminiscent of certain types of sirens used on emergency services vehicles or the kinds of sirens used to alert communities to evacuate or seek shelter from sudden incoming threats/emergencies.
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These bird Brazilian bird's shriek at sounds very high up to 125.4 decibels, it means if this bird can come near ear and speak then our human ear can be Burst or he/she can be Deaf.
Interesting. If I were to hear that sound outside I would never guess that was a bird.
Mother Nature beat us humans to inventing many of the more sophisticated gadgets we have. Digital cameras exist in our eyes and brains and a binary code is used to send them between the two.
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