https://ia802505.us.archive.org/14/items/various-bird-sounds/nightingale-41068.mp3
(2)
https://ia802505.us.archive.org/14/items/various-bird-sounds/nightingale-denmark-24282.mp3
(3)
https://ia902505.us.archive.org/14/items/various-bird-sounds/nightingale_near_street-23902.mp3