I know that great horned owls are not rare here, but I've lived here since 89 and can't remember hearing two calling to each other over an extended period of time as they have been for  perhaps the last hour or so. 'Here' is northern Montgomery county between I270 and Sugarloaf mountain.  What a pleasure to stick my head outside on a crisp winter night and listen. 

Sonnie and Nick Sussillo