The song of the Swainson’s thrush defies description — three low notes followed by an upward burble in a cautionary key, like a sound you might hear in space, as if R2D2 sang a piece by Mozart. While ...

Listen to the spring 'laughing' call of the green woodpecker. Watch as a male sits in a tree and sings. This is a nature documentary about wildlife from the Czech Republic in Central Europe. Bird song ...