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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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2 .Two centuries ago, blackbirds typically lived out their lives in forest habitats.
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3 .Today, the birds are one of the most common avian urban species.
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4 .Researchers have shown that urban and rural blackbirds already differ from one another in their songs, the timing of reproduction and their risk of diseases.
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5 .But could the country blackbird and its city cousin now have different personalities?
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6 .Scientists in Germany collected and hand-raised 28 urban birds and 25 from the country nearby.
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7 .The researchers tested the birds to determine whether they approached or avoided new objects in a familiar environment.
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8 .They performed the study three times over a year to see if the traits persisted.
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9 .And the urban birds avoided new objects near their feeders for significantly longer than did their rural relatives.
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10 .The study appears in the journal Global Change Biology.
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11 .The researchers say these personality differences may be related to genetic micro-evolutionary changes.
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12 .And that the findings demonstrate two things.
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13 .One is that urban and rural differences can be tested in a controlled experiment.
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14 .The second is that blackbirds and many other species may be quickly evolving new behaviors in response to our rapidly urbanizing world.
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15 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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