[AnAmericanMother]

Orlando Gibbons, "The Silver Swanne"

The silver Swanne, who, living, had no Note,
When Death approach’t unlock’t her silent throat.
Leaning her breast against the reedy shore,
Thus sung her first and last, and sung no more:
“Farewell all joyes! O Death come close mine eyes!
More Geese than Swannes now live, more Fooles than wise.”

[HandyDandy]

Is that what’s meant by “Swan Song”?