Artificial lighting and noise alter biorhythms of birds

Noise from traffic and artificial night lighting cause birds in the city centre to become active up to five hours earlier in the morning than birds in more natural areas. These were the findings from an investigation conducted on 400 blackbirds in Leipzig by the interdisciplinary research group "Loss of the Night". These findings showed how ambient noise and light pollution caused by humans have significant effects on the behavioural patterns of city blackbirds, affecting their natural cycles.

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