Song of the wren loud, beautiful, like the voice of the canary, and includes a mix of various trills with characteristic dry cod, ringing on a high note. As the XIX century German naturalist Alfred Brem, song wren consists of «long suite various successive high flute tones, which are in the middle of a fairly long songs into the vocal trill gradually fades, the latter is repeated frequently, and by the end of the song, at its conclusion, like». In an unusually loud sound wren cite many authors - for example, a distinguished ornithologist Russian Sergei Buturlin took notice that the «singing wren near, for example, in a room directly stun, and can not help wonder, how can such a small bird to sing louder or finch Early Riser» . Sing wren almost year round, a short interruption at the time of moult, which they accounted for July - September.During the singing settle any elevation - stub, a heap of wood or a branch of pine or spruce. Suddenly broke trill, then descend to the ground and hide among the dense thickets of undergrowth and the roots of fallen trees.
Observed that the nature of European singing birds is markedly different from their American counterparts, but even greater differences are observed in most of North America, where the two populations (western and eastern), geographically separated from each other. After some research on the vocal differences, ornithologists put forward a hypothesis that the original American wren West deviated from the eastern population, and then began the Old World populations.