What kind of "call" is this??

[Shade38]

I been noticing a sound coming from my RETFs tank the last few nights but could not confirm what the heck it was. When I approached the tank I could never hear it again. Anyway....did a google search and this is the closest sound to what I heard:

(not my video BTW) My red eyed tree frog, Burn "calling" - YouTube

What kind of call is it? My frogs are young so it couldn't be breeding calls already could it? The call I heard was even shorter than the one in the video, just a quick squawk. Thoughts?

[ViperJr]

That is, without a doubt, one of the two calls that A. callidryas have. Congratulations

EDIT: And yes, that call is their "non-breeding"-call, more just for claming terretory and such rather than attract females.