The Audobon Field Guide says it all: “Crows are thought to be among our most intelligent birds, and the success of the American Crow in adapting to civilization would seem to confirm this. Despite past attempts to exterminate them…”
The chief reason I wash my car is to remove the crow’s “work” which is either defecation or berry droppings. In the photo a crow rests on our fence between bombings. Crows squawk a great deal in the early morning and at dusk–sometimes making it sound like we live in the jungle. But I enjoy them and their smarts. For example, they don’t bother our bee hives while scrub jays do. Crows have learned not to mess with bees.