Bare throated bellbird. (João Menezes via SWNS)
Two new contenders for the world's loudest bird have been identified in a study of more than 120 species.
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Red Legged Seriema. (João Menezes via SWNS)
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Carolina Wren. (João Menezes via SWNS)
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Black capped chickadee. (João Menezes via SWNS)
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