Sand or digger wasp (Crabronidae & Sphecidae)Isodontia sp. (genus)

2 Unidentified Grass-carrying wasp at Wandiyali-Environa Conservation Area

4 images

Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017
Isodontia sp. (genus) at Wandiyali-Environa Conservation Area - 12 Dec 2017

Identification history

Sand or digger wasp (Crabronidae & Sphecidae) Isodontia sp. (genus) 16 Dec 2017 KimPullen
Sand or digger wasp (Crabronidae & Sphecidae) Isodontia sp. (genus) 14 Dec 2017 michaelb5.6K
Sand or digger wasp (Crabronidae & Sphecidae) Sphex sp. (genus) 13 Dec 2017 KimPullen
Unidentified 13 Dec 2017 Wandiyali324

Author's notes

These wasps were collecting grass flower/seed heads (Bothriochloa macra) to fill holes in an old burnt tree trunk. Box Gum Grassy Woodland

9 comments

KimPullen wrote:
   13 Dec 2017
These are interesting images. The only explanation I can think of to explain why a wasp would stuff a hole in a tree trunk with grass, is that it has a nest there and the grass is a barrier to intruders.
Wandiyali324 wrote:
   14 Dec 2017
thanks Kim, they have also been identified as Isodontia sp (Grass-carrying Wasps) by Dr Manu Saunders from New England Uni, with a similar comment that the grass is possibly a deterrent to predators.
Carolyn
michaelb5.6K wrote:
   15 Dec 2017
There is a reference for Isodontia sp. (genus) at:
https://bugguide.net/node/view/5691
RogerF wrote:
   15 Dec 2017
I have drilled holes in wood blocks for artificial bee/wasp nesting. Many are occupied by sphecids that stuff dry grass stems in the hole entrances, presumably to deter cuckoo wasps that are always inspecting the hole entrances. Also have photos. Good to have a name. Roger
Wandiyali324 wrote:
   15 Dec 2017
There were cuckoo wasps here too.
Wandiyali324 wrote:
   15 Dec 2017
and thanks Michael, good reference (it seems there is not much known about the Australian species).
RogerF wrote:
   15 Dec 2017
6 Species of Isodontia are listed in CSIRO Insects of Australia Vol II, as is the habit of stuffing the nest hole with grass stems. Isn't nature remarkeable. Roger.
KimPullen wrote:
   16 Dec 2017
Thanks everyone, this is a new genus for me.
gregbaines166 wrote:
   23 Dec 2017
Thank you everyone. There is so much to learn!

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Zosterops lateralis at Wandiyali-Environa Conservation Area - 1 Apr 2016
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Smicrornis brevirostris at Wandiyali-Environa Conservation Area - 1 Apr 2016
Pachycephala pectoralis at Wandiyali-Environa Conservation Area - 1 Apr 2016
Petroica rosea at Wandiyali-Environa Conservation Area - 31 Mar 2016
Pardalotus punctatus at Wandiyali-Environa Conservation Area - 25 Mar 2016

Page: 1 

Location information

Species information

  • Not Sensitive
  • Local Native
  • Non-Invasive

Sighting information

  • 4 - 15 Abundance
  • 12 Dec 2017 Recorded on
  • Wandiyali Recorded by
  • Website Reported via
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