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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » Sawflies, Horntails, and Wood Wasps » Horntails (Siricidae) » Tremex » Pigeon tremex, Pigeon horntail (Tremex columba)
Photo#317921
Bitternut Hickory tree insect in NE Wisconsin- resembles a wasp - Tremex columba
Copyright © 2009 jfroe939

Bitternut Hickory tree insect in NE Wisconsin- resembles a wasp - Tremex columba
northeast wisconsin County, Wisconsin, USA
August 9, 2009
Size: 1.25-1.5 inches
It resembles a wasp, but it doesn't look like the wasps I've seen online that should be in Wisconsin. It starts as a worm under the hickory bark then emerges in mid July to early August. We've noticed them for 2 years now. Also have seen some very drastic dieoff in the hickories in the same 2 years. Really would like to know what they are.
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Contributed by jfroe939 on 9 August, 2009 - 11:23pm
Last updated 28 August, 2009 - 8:52pm

Moved
Moved from ID Request.
… John F. Carr, 28 August, 2009 - 8:52pm login or register to post comments

It's...
a pigeon horntail Tremex columba! I don't think they have anything to do with the dieoff of the hickory.
… Breanna Lyle, 10 August, 2009 - 6:56am login or register to post comments

 
I agree.
I agree with Brianna's ID and assessment. Horntails are generally "secondary" pests that might hamper timber salvage, but are not usually a primary cause of tree die-offs.
… Eric R. Eaton, 10 August, 2009 - 8:33am login or register to post comments

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