Seems kind of amazing they get that high since they fly so incredibly slowly.  Maybe on a hot day that air sac acts like a hot air balloon?

Best,

Joe

============================================================
From: Carolyn Ruth Sturtevant <>
Date: 2004/06/02 Wed AM 11:27:50 EDT
To: 
Subject: [MDOSPREY] Altitude of Cicada flight

How high do cicadas fly?

... pilots in small planes found
that they were hitting 13-year cidadas at 5000 feet.