There was a song on a Burl Ives record we had as I was growing up. The lyrics were something like:

He came to my window one morning in spring,
the sweet little robin he came there to sing,
and the song that he sang was sweeter by far,
then ever was heard on a flute or guitar.

I have not been able to find references to it anywhere, or figure out which record had this song. Does anyone know the lyrics or of the recording?