This morning as I sat on my balcony, a large crow* landed on the wire in front of me, lifted its head, opened its beak, and let out a huge cawwww caw caw caw caw. After a pause, it repeated the sequence, cawwww caw caw caw caw, paused, did it again, paused, did it again. Then, from blocks away, came a response, cawww caw caw caw. And then, from still further away and in a slightly different direction, came another, cawwww caw caw caw. I had turned to face this unseen chorus. When I looked back, the first crow was gone, off perhaps to join its new found friends.
Birds are busy.
* Really, it was the size of a small cat.