Boreoides subulatus

2 Wingless Soldier Fly at Braemar, NSW

Boreoides subulatus at Braemar, NSW - 3 Apr 2025 09:56 AM
Boreoides subulatus at Braemar, NSW - 3 Apr 2025 09:56 AM
Boreoides subulatus at Braemar, NSW - 3 Apr 2025 09:56 AM
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Identification history

Boreoides subulatus 14 Apr 2025 Curiosity
Boreoides subulatus 14 Apr 2025 Curiosity

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User's notes

This pair of soldier flies was on our garden shed. As I watched and photographed, a wasp briefly landed on the pair, dislodging the male. Later in the day I saw a similar wasp land on another female's abdomen. When the wasp flew away, a drop of turquoise-coloured liquid was where the wasp had been.

7 comments

GlossyGal wrote:
   15 Apr 2025
Wow! What an interesting series of shots and observations 👍🏻
Curiosity wrote:
   15 Apr 2025
Hi, and thanks, GlossyGal. I was surprised and disturbed by the wasps attacking the soldier flies.
GITM1 wrote:
   15 Apr 2025
Very interesting. I have heard of wasps doing that to caterpillars and laying their eggs inside, but I never knew they did that to Soldier Flies
Curiosity wrote:
   16 Apr 2025
Hi GITM1. I, too, have wondered why the wasps were attaching the soldier flies. Canberra NatureMapr has a good description of the behaviour for Vespula germanica (European Wasp). After reading it, I think the wasps' attacks on the soldier flies could be just an example of their usual aggressive behaviour toward other insects. I've been seeing quite a few of these social wasps around the yard & nearby.
AlisonMilton wrote:
   16 Apr 2025
Hi, Yesterday I watched a European Wasp attacking a European Honey Bee in the grass on my front lawn. It came back several times and it seemed the bee was slowly dying as it struggled in the grass for some time. By the time I got my camera the wasp didn't come back. I presumed that since the wasps like sweet things that it might have been stealing the pollen from the bee, but killed the bee in the process.
Aussiegall wrote:
   16 Apr 2025
Interesting observations. Curiosity if you have been seeing quite a few euro wasps I would be concerned that there was a nest nearby. We had a nest in our compost heap which I didn't know about until I went to turn it over. Fortunately, I only got bitten once. It might be worth having a scout around to see if you could locate the nest and get rid of it. We ended up getting a pest control guy to come in, too many Euro wasps for my liking for me to tackle. After he dusted the nest and they had died, he dug the nest up, it was a massive nest, bigger than a netball
Curiosity wrote:
   16 Apr 2025
@AlisonMilton, wow - interesting observation and interpretation. And thanks @Aussiegall for your good suggestion. Given these examples of the aggressiveness of the wasps, I need to be on the lookout for a nest.

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Location information

Sighting information

Additional information

  • wasp - Vespula (genus) Associated animal
  • 25mm to 50mm Animal size
  • Mixed Gender

Species information

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  • Verified by an expert moderator
  • Nearby sighting(s) of same species
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