Listening to birdsong is one of life’s great joys, but when researchers heard a particular tune emerging from a tree in a Buenos Aires park, they were especially jubilant. This arrangement was among those chirped by the local rufous-collared sparrows in the 1960s, but had since disappeared from the area.
That was until scientists created a computer-generated rendition, curious to find out if birds might consider it realistic enough to imitate. Less than three months later, a local avian resident began to copy parts of the song.
