Cooper's Hawk Harasses Barred Owl

Today Dory and I were walking Chomsky in the backyard, and heard a Cooper's Hawk making a racket. Turns out, the hawk was harassing a Barred Owl! We went quickly back into the house, left Chomsky there, and I grabbed the binoculars and my camera. Luckily I had the long lens already attached, and was able to get about 13 pics before both birds flew away.

By the way, how do you tell a 5-month old to please be quiet so she won't scare the birds away?