are you sure about the time? i couldn't hear anything special..? only traffic on the big road. that's usual in the nights.
the dawn was cracking in the east. after a long search i found this:
6:12:40 there was some rustling.
6:32 blackbirds woke up and started talking. also a pygmy owl called.
6:34 two pygmy owls called.
after that the owl(s) called several times till 6:43. there were t least two owls.