Giant Ichneumon Wasp - Megarhyssa macrurus
Hymenoptera family Ichneumonidae
Live adult male and female wasps photographed in the wild at Winfield, Illinois, USA.

 

Megarhyssa macrurus

Megarhyssa macrurus
Male Megharyssa wasp searchs with his antennae for emerging virgin females with which to mate.

 

Male Megarhyssa wasps gather at trees or fallen logs where female wasps are emerging in springtime. They seek to inseminate the females by two methods - waiting for them to emerge, or actually inserting their abdomens into the hole from which the female will shortly emerge. (Talk about robbing the cradle!) Competition is tight, and it is not uncommon for two males to have their abdomens inserted into the same hole simultaneously.


Male lacks stinger or ovipositor

Giant Ichneumon Wasp - Megarhyssa macrurus
Female Megarhyssa laying eggs, her ovipositor drilled into a fallen log. Select the picture for the complete photo-essay.

 


Paper Wasp
Polistes dominula

Great Black Wasp
Sphex pennsylvanicus
Great Golden Digger Wasp
Great Golden Digger Wasp
Sphex ichneumoneus

Bald-faced Hornet
Dolichovespula maculata
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