Hi all - I just ran across this forum while trying to ID loud, strange screech/scream sounds coming from my yard the past few weeks. I think it's young Barred owls trying to learn how to call. I came to this realization a few nights ago when at least 4 adults were hooting from different trees, while the single screeches were interspersed and very close. I finally was able to spot a young owl as it was bobbing it's head on a branch 15-20 feet above me. It was eying me curiously and was a lot bigger than I expected. Very cool experience!