Study shows city life may cause permanent change in circadian clock for blackbirds

(Phys.org) —An international team of researchers working in Germany has found that blackbirds that live in the city tend to have different circadian rhythm cycles than do blackbirds that live in a nearby forest. In their paper published in Proceedings of the Royal Society B, the researchers describe the results of their field and lab study comparing activity times of the two groups of birds.

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