The Call Of The Crows

I go to work at the same time that the crows do.

They winter in Bethlehem and Fountain Hill, millions of them roosting near the river, the leafless trees ominous with their dark rustling forms at night. In the morning they all scatter, to forage in Bethlehem or maybe nearby farm fields and garbage dumps etc -- I'm pretty sure crows are omnivorous, people talk about feeding them corn and I've seen them quarreling over roadkill, there's probably quite a variety for them to eat around here -- and you can see them just at sunrise, flying just over the rooftops and calling to each other. It sort of looks like the flying monkey scene in The Wizard of Oz sometimes, there can be so many of them in the sky, and it's easy to pinpoint where they're coming from, because they all seem to radiate from a single point on the horizon.

As the sun rises earlier and earlier, I'm falling more and more behind my carpool buddies, and lately there are just a few stragglers by the time I go outside. I can hear the cacophony peak and subside outside, and I know I'd better get myself out the door, and by the time I'm outside and it's just me and the stragglers the individual calls can easily be distinguished.

Most of the time I notice a sort of even-numbered grouping of caws, like "caw-caw, caw-caw," i.e. groups of two with a short pause in between.

I've heard as many as six caws together like this, but it's mostly two or four; the other day I heard an unusual set, three caws like this: "caw-caw, caw," repeated back and forth between the stragglers.

What does it all mean? I'd heard that crows are pretty intelligent, and they are obviously social, so the calls must play some role in all that communal living. Strangely, they don't seem to call as much at night, though they're pretty vocal when they gather at dusk and scatter in the morning. Maybe they just converse quietly amongst themselves, with their "indoor voices," once they're roosting.

I tried Googling "crow calls" but found out very little, aside from the fact that different populations of crows have different accents, and possibly different vocabularies. (There seems to be a market for crow call CD's, to be played as decoys when hunting. This is a fairly creepy technique practiced by someone near Sals over loudspeakers, blowing the crows out of the sky and littering the trails with blood and broken birds. It's worst when there's snow on the ground.) Apparently, some sounds are known to be alarms, and some are "gathering" calls, but no one I found distinguished the calls, or their meaning, in terms of number or cadence/inflection of caws.

I guess it will have to remain A Mystery.