Re: #2 I live in an area that has many crows. I hear them when I am first getting up, at around 4am, and then again at twilight (currently around 7pm). They caw, and chatter back and forth, and it is such a lovely, raucous sound! I have not really seen their nests (or at least I haven't been sure if the nests I saw were the crows' or other birds). I will be paying more attention as I learn more about them!