se link between bird song volume and a male’s nesting success. The study is in the journal PLoS ONE. [Erwin Nemeth et al, Rock Sparrow Song Reflects Male Age and Reproductive Success]
The male isn’t just singing his sorrows, however. The researchers propose that the male raises his voice in a desperate attempt to call back his partner—the rock sparrow version of the late-night drink-and-dial.
—Daisy Yuhas
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