Nature & Environment
April 4, 2012 ·
2 comments
Image Credit: CC 3.0 Alvesgaspar
Source: PhysOrg.com | Comments (2)
Sparrows change their tune in cities
By T.K. RandallApril 4, 2012 ·
2 comments
Image Credit: CC 3.0 Alvesgaspar
Sparrows have been found to change their song so that they can be heard in loud environments.
A new study to be published in the April edition of Animal Behaviour suggests that the songs sung by Sparrows has changed to make them stand out against the ever increasing background noise of large cities. The study is the first of its kind to track changes in the songs of certain birds over time. Scientists used the recordings of sparrows from 1969 to 2008 to demonstrate that the birds' responses were markedly different now than in the past.The study, "Birdsongs Keep Pace with City Life: Changes in Song Over Time in an Urban Songbird Affects Communication," compares birdsongs from as far back as 1969 to today. The researchers also detail how San Francisco's streets have grown noisier based on studies from 1974 and 2008.
Source: PhysOrg.com | Comments (2)
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