Michael Price writes:
> Maybe this is how they spread the word about food resources (crows can't
dance) and >potential dangers.
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I'm certainly not an expert on crow behavior; but this is frequently
postulated in what I've read.

>Any behavior this distinct has a point, or points. I could also
>easily imagine that their high intelligence would mean there'd be
distinctly
>different personality types among crow individuals, some of whom would
>decide not to join the mass roosting movements. But whatever the objective
>of mass roost flights, though, it seems important for all crows in
>non-breeding time to participate, because they all seem to do it though it
>means a long flight twice daily.
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My understanding is that not all crows go to communal roosts. Many prefer
to roost in family groups.

It seems to me that roosting for social reasons wouldn't necessarily imply
vocalizations. Maybe they just like to sleep near other crows. Crows have
an amazing quantity of vocalizations, most of which are very soft. Little
peeps and clicks and coos that you'd never hear unless the crow happened to
be sitting on your shoulder.

John Shelton
Portland, Oregon