The Yellow Hairy Flower Wasp (Radumeris tasmaniensis) is native to Australia and Papua New Guinea, although they have been sighted in New Zealand (as an invasive species).

Whilst they are found along the coastal regions of eastern Australia, stretching south to Victoria and into South Australia, and the south-western coastline of Western Australia, these photos of the Yellow Hairy Flower Wasp were taken in Central Australia.

Like other Scoliid wasps, the females have short antennae, whilst the male of the species have longer antennae. On sighting a small group of these Yellow Hairy Flower Wasps, they were resting on a guava shrub in Alice Springs, with some variation in sizes, the largest being about 2 cm long.

The Yellow Hairy Flower Wasp are larval parasites, the size of the wasps appear to depend on the size of the host larva.

Sometimes Radumeris tasmaniensis is confused with Radumeris radula, and whilst radula is found in the north of the country, tasmaniensi is found mainly in the south. The easiest way to distinguish them is from the colour of the setae on the top of the thorax of the female wasp. In Radumeris tasmaniensis it is yellowish in colour, whilst in Radumeris radula it is a uniform rusty red-brown in colour.


  • Scientific classification
  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Hexapoda
  • Class: Insecta
  • Order: Hymenoptera
  • Superfamily: Vespoidea
  • Family: Scoliidae
  • Genus: Radumeris
  • Species: R. tasmaniensis
  • Binomial name: Radumeris tasmaniensis

Footnote & References

  1. Radumeris tasmaniensis, iNaturalist NZ, https://inaturalist.nz/taxa/396245-Radumeris-tasmaniensis / https://inaturalist.nz/taxa/396245-Radumeris-tasmaniensis/browse_photos
  2. Radumeris tasmaniensis, Atlas of Living Australia, https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:4cc9abe1-8adf-4e83-bd7f-69c61f8a0cdc
  3. Yellow Hairy Flower Wasp, Ellura – Ants, Bees, Flies & Wasps, http://www.ellura.info/Insect/Wasp/DSC04885RF-Yellow-Hairy-Flower-Wasp-Radumeris-tasmaniensis.html
  4. Hairy Flower Wasp – Scoliidae – Campsomeris sp, 3 May 2012, by William Archer, Esperance Fauna, http://esperancewildlife.blogspot.com/search/label/Insects%20-%20Wasps
  5. Yellow Hairy Flower Wasp – Campsomeris tasmaniensis, Brisbane Insects and Spiders Home Page, https://www.brisbaneinsects.com/brisbane_vespoidwasps/YellowHairyFlowerWasp.htm