I was just sitting outside listening to all the chirps and tweetles of the various songbirds, and I was reminded of the opening notes of "The Holly and the Ivy" and the ending motif of "Sheebeg Sheemor", which both sound like birdsong when played on the whistle (though I don't know which birds...).

Anyway, here's the request...

What other songs/tunes have "birdsongs" in them?

V