In a message dated 12/04/02 05:04:28 GMT Daylight Time,
[log in to unmask] writes:
<< How do bees and other animals detect air pressure changes? >>
They do have internal air sacs in their abdomens. Presumably a sudden drop
in external air pressure would cause the internal sacs to expand and give the
bees a sensation, tummy ache perhaps, that suggests they head for home.
Chris