I have 3 nests of owls in my backyard and it's mating season....And everynight for several weeks between 2 and 3 AM...the one does it's usuall...hoo hoo hoooooo...then eventually some guy owl comes along and my God the screaching he makes.....they go at it back and forth for several minutes before...I guess, they do their thing...I actually kinda like hearing it, cuz it's nature but when its the dead of night, those guys are loud.