Strangely, wax moths do have a tympanum - Spangler used to demonstrate 
this by shaking a ring of keys several feet from a flying moth in the 
lab. The moth usually folds its wings and drops to the floor. He 
surmised it was to avoid bats echo-location. Try it.  He also built a 
small device on a rotating stand to broadcast this wave, with the hope 
of keeping waxmoths off stored combs.  - Your USDA at work!
(and I'll bet few of you have ever heard of this research)
     - John

On 6/1/2011 2:48 PM, [log in to unmask] wrote:
> I was waiting for some else to address this.  Unlike insects such as
> grasshoppers, bees don't have a tympanum (a form of ear).
>
>

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