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Re: hovering diversity (was Re: Ornithurine diversity)



> >> I once watched a small falcon [...] It literally
> hung in the air
> >> without beating it's wings at all by facing
> into the wind
> 
> And Jim Cunningham (jrccea@bellsouth.net) responded:
> 
> > Facing into the wind will not help the animal to
> maintain altitude.
> > Something else must have been going on as well, in
> order to provide
> > energy for hovering at constant altitude.

> I see it
> all the time on the bluffs above the beaches near Santa
> Barbara. 

In this case the "something else going on" is the way the bluffs alter the 
airflow such that there is an upward component/lift