swan song

[mathman]

How did the term "swan song" become the term for the last performance of an entertainer or athlete?

 

[geordief]

How did the term "swan song" become the term for the last performance of an entertainer or athlete?

Shame on you for your poor Google skills

https://www.phrases.org.uk/meanings/swan-song.html

The dying (mute) swan was thought to finally find its voice ......