Black snakes in trees

Black snakes are a good thing! It must be Spring as our Black Snake is back. Black snakes will keep your property clean of rodents as well as Starlings (bird) that nest around the roof area of your home. They, at least ours, is not aggressive at all. This year our buddy made his grand entry in our house, that we are remodeling. He/she was hanging by his/her tail over the back door, doing twists and turns like an acrobat. \

Our Jack Russell Terrier discovered it first and started barking. Knowing it was the Black snake back, we just let it do it's thing and be on it's way. Later we saw it crawling around the gutters on our shed. Personally, I know a Black snake when I see one but I can certainly appreciate some people wouldn't have a clue what a Black snake looks like compared to a venomous snake, which brings me to my question.

Is it true that Black snakes are the only type snake that will crawl around house rafters or other high places in your house? I was told that venomous snakes are considered earth snakes that may crawl high on a mountain top but not in a home. If that is true, it may save many Black snakes lives if people knew that.

Please don't kill Black snakes as they are gentle and do a good job keeping unwanted rats, mice and yes those pesty birds called Starlings.