Bethel Park, Allegheny County, Pennsylvania, USA August 21, 2012
This was the largest Wheel Bug (Arilus cristatus) I have ever seen in my life (female?) When disturbed, it extruded an orange glandular organ of some sort. I was reminded of osmeterium in swallowtail caterpillars. Does anyone know anything about this? I've never noticed one do this before. Can't say I noticed any smell, but it was after a rain and a buddleia was competing with scent. Thanks!
Contributed by Monica Miller on 7 September, 2012 - 7:05pm Last updated 7 September, 2012 - 8:49pm
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