Blackbird singing in the dead of night
Take these sunken eyes and learn to see
All your life
You were only waiting for this moment to be free.

Blackbird fly Blackbird fly
Into the light of the dark black night.

"Blackbird"
~~The Beatles

And as for "Bye Bye Blackbird" I found this:
"1926 song written by Ray Henderson (melody) and Mort Dixon (lyrics)". Hope this answers that question DubDub!