I died with Anivia, so I went into my egg form and right when I was about to be reborn, the egg died. My body showed up as the bird. Anyways for the rest of the game I could hear the wind blowing noise of my egg, and then it cracking, for the rest of the game!!! It was pretty annoying.

Thanks for reporting this Razzle Dazzle

Just to be clear, was the entire sound looping (whistling, egg cracking and then a birdcall) or just a portion of it?

BB-226

I reported the same bug with no reply. -.-

It seems to be caused by being in an egg, then teleporting and surviving.
and yes, it whistles, egg crack, birdcall. it loops until you undergo egg again and die.