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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.

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Two centuries ago, blackbirds typically lived out their lives in forest habitats.

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Today, the birds are one of the most common avian urban species.

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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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But could the country blackbird and its city cousin now have different personalities?

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Scientists in Germany collected and hand-raised 28 urban birds and 25 from the country nearby.

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The researchers tested the birds to determine whether they approached or avoided new objects in a familiar environment.

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They performed the study three times over a year to see if the traits persisted.

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And the urban birds avoided new objects near their feeders for significantly longer than did their rural relatives.

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The study appears in the journal Global Change Biology.

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The researchers say these personality differences may be related to genetic micro-evolutionary changes.

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And that the findings demonstrate two things.

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One is that urban and rural differences can be tested in a controlled experiment.

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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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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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