From Johann Matthäus Bechstein’s Gemeinnützige Naturgeschichte Deutschlands nach allen drey Reichen: ein Handbuch zur deutlichern und vollständigern Selbstbelehrung besonders für Forstmänner, Jugendlehrer und Oekonomen, volume 4 (1795):

Twenty-four different strains or couplets may be reckoned in the song of a fine nightingale, without including its delicate little variations; for among these, as among other musicians, there are some great performers and many middling ones. This song is so articulate, so speaking, that it may be very well written. The following is a trial which I have made on that of a nightingale in my neighborhood, which passes for a very capital singer:—

Tioû, tioû, tioû, tioû.
Spe, tiou, squa.
Tiô, tiô, tiô, tiô, tio, tio, tio, tix.
Coutio, coutio, coutio, coutio.
Squô, squô, squô, squô.
Tzu, tzu, tzu, tzu, tzu, tzu, tzu, tzu, tzu, tzi.
Corror, tiou, squa, pipiqui.
Zozozozozozozozozozozozo, zirrhading!
Tsissisi, tsissisisisisisisis.
Dzorre, dzorre, dzorre, dzorre, hi.
Tzatu, tzatu, tzatu, tzatu, tzatu, tzatu, tzatu, dzi.
Dlo, dlo, dlo, dlo, dlo, dlo, dlo, dlo, dlo.
Quio, tr rrrrrrrr itz.
Lu, lu, lu, lu, ly, ly, ly, ly, liê, liê, liê, liê.
Quio, didl li lulylie.
Hagurr, gurr quipio!
Coui, coui, coui, coui, qui, qui, qui, qui, gai, gui, gui, gui
Goll goll goll goll guia hadadoi.
Couigui, horr, ha diadia dill si!
Hezezezezezezezezezezezezezezezeze couar ho dze hoi.
Quia, quia, quia, quia, quia, quia, quia, quia, ti.
Ki, ki, ki, ïo, ïo, ïo, ioioioio ki.
Lu ly li le lai la leu lo, didl ïo quia.
Kigaigaigaigaigaigaigai guiagaigaigai couior dzio dzio pi

Image:
Part of David Hindley’s transcription of a nightingale’s song; from “The Music of Birdsong,” Wildlife Sound 6 (1990).