The wait ended Sunday night as Syd arrived at 8:48p to inside the box. She got a little “shut eye” and preened a bit, Syd left the box at 9:23 pm PDT went to the roof and screeched for Mel, she then flew off at 9:26 pm.
A:Because it has such a wide range of calls, some seventeen sound signals, this has given rise to some of its folk names such as “hissing owl” and “screech owl”. Some of these sounds are non-vocal, such as tongue-clicking, which was previously thought to be the Owl snapping its beak (bill). http://www.owls.org/Species/tyto/voice.htm