New explanation to early morning singing start of birds
News from Linnuvaatleja, www.linnuvaatleja.ee
Translation Liis
While there generally is a consensus on the purpose of bird song – singing is the easiest way of self-promotion and warnings to competitors – the springtime birdsong in early mornings has been explained in several ways. It has for instance been thought that on a calm windless morning when the background rustling is absent the singing reaches further and it is efficient for the birds to warn competitors and attract partners. It has also been proposed that in singing the male birds gobble early morning cool air, because it cools the sexual organs and protects the germ cells from overheating.
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