"Ter-wit-ter-woo"

"Ter-wit-ter-woo", clearly this is not a real word but is however a personal development of the more common sound discription an owl makes "Twit Twoo". I'm not entirely sure why it's in my mind today, my two explanations would be either 1. I live in a house surrounded by outbuildings with very noisey nocturnal ter wit ter wooers or 2. I remembered today my close encounter with an owl at 6:50am on Christmas eve coming off the M3 onto the A303 heading to the Westcountry for Christmas........Ter-wit-ter-woo!