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City Bird Limits

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Old Monday 11th March 2013, 14:52   #1
Kits
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City Bird Limits

City noise from traffic is affecting how bird song appears to female birds, which could impact on breeding levels.

Full article here.

The rising level of noise in urban areas may be preventing some species of songbirds from setting up home in developed areas, a study has concluded.

Canadian researchers found that noisy surroundings masked the lower frequencies of bird songs, affecting the way some species communicated.

Unable to hear all elements of a song, females could perceive singing males as ill-suited mates, they added.

The findings have been published in the Global Change Biology journal.
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Old Monday 11th March 2013, 19:13   #2
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Another variation on the same theme here http://news.bbc.co.uk/1/hi/sci/tech/6591649.stm
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