@Great Argus Marbled Frogmouth was also subtlety creepy with a bill snap. Yellow-bellied Glider was also heard and that has to be the most unnerving sound I've heard in a forest ever.
@Great Argus if you think this is unnerving listen to Australian Masked Owl lol. That one is even worse and they’re also found in dense rainforest too.
@Yoshistar888 Even the regular Barn Owl is unnerving enough when one gives the hunting scream over your head out of nowhere! Sometimes it's as much the startle factor even when you know what it is.