Hi guys, there's a specific call I've been trying to identify for quite some time, but never could get it figured. Obviously the terriblis' call is the primary call is this short video clip, but what I would like to identify at the high pitch whistles/chirps in the background. Most noticeable between 0:07 - 0:09. I could be wrong, but believe it's an amphibian of some sort. Any takers?