I live near the Quabbin reservoir in MA and the ravens nest near the spillway every year. In the spring the pair sit together and appear to be grooming each other looking like a contented couple. The most noise I have heard from them is when a parent flies in to feed the young. When I hear the gronk sound I know they are nearby even though I might not see them. Crows on the other are a noisy bunch and have so many different sounds and are quick to defend their territory.