"Jim Skydell" wrote in message
...
Other research done in the 70's was carried out by a glider pilot in Africa.
He wanted to
figure out where all the buzzards went during the middle of the afternoon (all
would
disappear every day). They thermaled up, out of sight from the ground. Either
for
pleasure,or to cool off?

Or simply because it takes little energy and makes them temporarily safe
from all ground-bound predators?

Vaughn