Bsondahl, that's just lovely! Thank you! It's the changes in the underlying chords that make those same two notes bearable after the first dozen repetitions, for me anyway. Now, if the chickadees could only sing in harmony ... or maybe I could drag my weary bones out of bed and accompany them on the guitar!    ;)

I heard a very pretty bird-melody the other day - couldn't see the little vocalist but I bet the song is species-specific. It went up a minor 6th, down a major third, and ended with a series of staccato notes and an upwards glissando. If you play the note E for one beat, then up to C and hold for 2, down to Ab for one beat followed by 6 quick staccato notes and then an upwards slide, it's a pretty fair simulation. The little creature kept perfect time too, and never went off-key. Very impressive!

Anyway, if you're not a musician you'd have to be pretty obsessive-compulsive to analyse bird-songs, I guess.

daylia