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This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?

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A canary's song sounds sweet and innocent, to us anyway.

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But for male birds, music is actually part of a testosterone-fueled mating ritual.

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So what's the pathway from hormone to harmonics?

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It was thought that male canaries became motivated to sing when testosterone hit the specific brain region normally responsible for mating behavior.

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It's called the medial preoptic nucleus, or POM.

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To find out, scientists first gelded some unfortunate individuals.

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Some of these canaries received doses of testosterone to the POM only.

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Others got broad testosterone exposure throughout the brain.

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After treatment, both groups of canaries began singing.

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Although they sang roughly the same amount, the birds receiving broad hormone doses made music that was louder and of higher quality.

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They also sang more while potential mates were present.

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The study is in the Proceedings of the National Academy of Sciences.

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So testosterone in the POM does inspire mating behavior.

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But the hormone must act more globally to create a proper performance.

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Quality courtship requires a complete bird brain.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwic.

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