I am posting this because @vignouse questioned how they got on the roof. We believe though we can't see that the nest is in or on this metal thingy (I love being technical).
metal thingy.....technical....yeah!!! haha!! I'm sure they are nesting in there. We are having such horribly dry days, with branches falling, nests being blown out of trees, and horrible fires resulting in two houses being burned to the ground. So sad. Thankfully the fires were on the opposite side of town from where I live.