Mary Manson wrote:

> I've been watching for a "hovering" answer and haven't seen one yet that
> referred to temperature - as in [heat] thermals used by glider pilots - to
> explain the ability of larger birds to hover in "still" air .....
>
> Toni
> Seattle

A thermal is like a invisible doughnut that breaks loose from the ground and
rises up until it condenses into a cloud. some are very small and some are VERY
large. The large ones are called "Boomers." People that fly radio control
gliders have lost planes in boomers. I almost have two different times.

Oh ya.....birds. A bird can soar up up and away in a thermal, but I don't think
it can "hover" in one, unless it "hovers" while it is going in a circle and
rising up at the same time which is back to soaring. :-)

Jerry and Sandy Converse
Grand Coulee, WA
mailto:sanjer at televar.com

http://members.tripod.com/nature_scenic_photos/

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