Bluebirds and Kingsnakes

I like birds so I build houses hoping to attract Western Bluebirds. This year we succeeded in attracting a nesting pair to a birdhouse mounted on a large oak. Hearing distressful chirping, I noticed this California King Snake that had somehow climbed the huge oak. It apparently could smell the eggs or young as it circled and then snaked up the face toward the hole. I went into action, knocked it down, and chased it away, thus interfering with the Darwinian fitness test. Next time I will kill it.