Wren
Its song is a gushing burst of sweet music, loud and emphatic. It has an enormous voice for its size, ten times louder, weight for weight, than a cockerel. Its song may sometimes be confused for the dunnock, which has warble that is shorter and weaker. The wren's song also has trill sounds, which the dunnock does not. The male has a long and complex song, with a series of tinkling trills one after the other for seconds on end.