Mystery Solved

For years I have been trying to figure out what animal makes a particular sound I hear only at night.
I've researched it and researched it and thanks to this website:
http://www.learner.org/jnorth/tm/spring/OwlDictionary.html
I now know the answer!! The strange sound I have been hearing is from baby barred owls.
I figured it was some type of baby bird but I wasnt sure what kind.
I get to hear the adults "sing" all year long,,,,and in the Spring I get to hear the babies. :)