Gasteruption jaculator


This bizarre creature is called Gasteruption Jaculator. I kid you not! I posted some shots of this strange wasp last month, wrongly identifying it at the time as a type of sand digger wasp. I am grateful to afrenchgarden for the correct i.d.

wasp in flight

They do look strange in flight. Well, I admit it, they look strange all the time! Strange, but harmless, to us. Not so, however, for solitary bees, on whom these wasps are parasitic. That long spike is an ovipositor, with which the female deposits eggs on the larvae of solitary bees. You can guess the rest.

parasitic wasp on fennel

For my earlier post on these weird critters, see here.

27 thoughts on “Gasteruption jaculator

  1. I find her (?) more fascinating than creepy, and am inspired to learn more – like how enormous they are. Fabulous shots!

    • Hi Sid. Yes, a she. She is not very large, certainly not enormous, which given her appearance is something of a relief! You can see her here on fennel. My recent honey bee shots are also on fennel, so you can compare sizes.

  2. Pingback: The return of Gasteruption Jaculator | Focused Moments

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