Meanings of even birdsong in English

Not even birdsong, the echo of children playing or a dog barking.

The First Symphony of Mahler's is very wide-ranging, a symphony of melodies - great tunes, even birdsong, songs, dances and harmonically-infused counterpoint.

Then the planes were gone, and in the huge silence that loomed over the fields and trees and the village, there was not even birdsong.