Sparrows Sing Louder Than Earlier
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'Sparrows Sing Louder Than Earlier' - 1 News Result(s)
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Modern sparrows sing louder to be heard
Urban sparrows today have a far more high-pitched song than they did 50 years ago because they want to be heard over noise of the city, experts say. American researchers compared archived recordings of sparrow song from the 1960s with tapes made in the same area of San Francisco in 2005.
'Sparrows Sing Louder Than Earlier' - 1 News Result(s)
-
Modern sparrows sing louder to be heard
Urban sparrows today have a far more high-pitched song than they did 50 years ago because they want to be heard over noise of the city, experts say. American researchers compared archived recordings of sparrow song from the 1960s with tapes made in the same area of San Francisco in 2005.
