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1 .This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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2 .A canary's song sounds sweet and innocent, to us anyway.
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3 .But for male birds, music is actually part of a testosterone-fueled mating ritual.
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4 .So what's the pathway from hormone to harmonics?
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5 .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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6 .It's called the medial preoptic nucleus, or POM.
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7 .To find out, scientists first gelded some unfortunate individuals.
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8 .Some of these canaries received doses of testosterone to the POM only.
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9 .Others got broad testosterone exposure throughout the brain.
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10 .After treatment, both groups of canaries began singing.
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11 .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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12 .They also sang more while potential mates were present.
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13 .The study is in the Proceedings of the National Academy of Sciences.
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14 .So testosterone in the POM does inspire mating behavior.
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15 .But the hormone must act more globally to create a proper performance.
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16 .Quality courtship requires a complete bird brain.
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17 .Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwic.
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