As I awaited, hoping to see more of the three young owls together an incredible turn of events occurred. A loud squawking sound came from a home antenna not far from the nest. The bird making the noise was a peregrine falcon who squawked some more before bolting from his post to do continuous fly - bys at the owl nest. The concerned Great Horned Owl mother swooped into her nest from a nearby tree to protect her three youngsters. The falcon continued to fly by the nest, hover and then head back to his perch on the antennae. This squawking and fly by behavior lasted for more than an hour until the sun set and the falcon quit his pursuit - at least until another day.