Isolated finches still produce what are called innate or isolated songs.

Isolated finches still produce what are called innate or isolate songs. A specific tune might be taught, but the instinct to sing seems to be hardwired into a songbird’s brain. Innate songs sound different from the “cultured” songs learned from other finches—at first. If isolated zebra finches start a new colony, the young birds pick up the isolate song from their parents. But the song changes from generation to generation. And after a few iterations, the melody actually starts to resemble the cultured songs sung by zebra finches in the wild.