Charles Schulz was a very careful transcriber of music into Peanuts. Many passages are identifiable (lots of Beethoven, no surprise). However, Schulz could not read music himself -- thus copying from printed sources in his library.
But, in this comic, featuring Woodstock, the music is ... weird. Are they random? Is it just "off" in its transcription (Do you otherwise recognize it?)? Is it to reflect the tunelessness of birdsong? Would love to hear some ideas.