Owlman sketch Credit: Tyler Houck
The people who saw it said it looked like a man, but had wings instead of arms. The head and face of the creature was described as "unnatural" and had a gaping black mouth, with large eyes, and pointy ears.
The Owlman seems totally unnatural, but, if it is somehow related to owls, the "pointy ears" on it's head might make some sense, like in the picture below.
A Great Horned Owl looking like it has pointy "ears."
Picture Credit: http://www.owlpages.com/owls.php?genus=Bubo&species=virginianus
If the Owlman is real, it could be some supernatural creature. It is usually seen around an old graveyard and church, located on a Ley Line. For more Owlman info, Check out these books:
Encounters With Flying Humanoids by Ken Gerhard
The Owlman and Others by Jonathan Downes