The other day I saw a crow fly by. I heard AH-AH. The second AH had a different pitch than the first AH and it was slightly more elongated. I heard this vocal event twice.
One day from the bathroom window, I could hear some kind of uproar outside. It was like nothing I had ever remember hearing, not even when the crows surrounded some poor trouble making hawk on a college campus in Schenectady, New York.
Crows call while flying, something which I have only witnessed in some birds: common swifts, common nighthawks, and killdeers are birds that come to mind. Crows also call when perched. Their many calls seem to have a purpose...much more than "get away from my nest," or trying to attract a mate...which I don't know is even true for them. Speaking of mates, the other day I saw some interesting movements and wondered if I was watching mating rituals. There were two crows involved and flying took place over a very small area among the trees. At least one of the crows would fly down from a tree towards the ground and then fly back up in a sweeping motion. After watching it some times, the movements seem to have a purpose, at least to me. More observations are needed!
