The "pff-FWEET" and "chk" sounds. Most of the audio is not that, but when it happens it's hard to miss because it is VERY LOUD, you can hear it pretty early on in the second recording, at about 19 seconds in. You can also hear another one in the distance doing the "pff-FWEET" call I think, though you can only hear the latter part. Any time this one would do the first sound, it'd puff itself up real big on the "pff" part, like it was taking the biggest breath it possibly could lol