Taxonomy

Vespula (Vespula) rufa | Red Wasp

Distribution

Status

Conservation status

Ireland: unknown.

Europe: unknown.

Global: unknown.  

Native status

Native.

Species Biology

Identification

  • Yellow and black often with reddish areas on the first two tergites (first two sections of the abdomen).
  • Eyes almost touch the mandibles i.e. the oculo-malar space is short (the distance between mandible and lower margin of eye shorter than the width of the antennal scape (the basal segment of the antennae)). 
  • Ocular sinus black with a narrow yellow stripe present along its base.
  • Clypeus (front of the head between the eyes) often with black anchor-shaped marking, male yellow or more usually with a small black spot. 
  • Gena (band at the side of the head behind the eye) black with a yellow marking in the upper (dorsal) region of this feature and sometimes a smaller (ventral) yellow marking in the lower region of this feature. Male has a continuous yellow stripe. 
  • Yellow lateral band on the thorax.

Habitat

Found in open habitats, e.g. open woodlands, moorland and hedge banks, less commonly in urban areas. Nests are usually subterranean (e.g. in rodent burrows) in a dry, often shaded situation, close to the soil surface, even just under the leaf litter or moss layer, sometimes in rock cavities or inside decaying logs. They can be also found in hollow tree stumps and suspended from roots of trees in hollows in the ground. Nests are rarely above ground (in dense bushes, cavity walls, bird boxes and eaves of houses).

Flight period

Generally from late March to September. 

Life cycle

The life cycle of social wasps including that of V. rufa can be divided into four phases, namely the foundation, worker, reproductive, and intermediate phases. 


This social wasp has an annual life-history with the overwintering queens emerging from late March until early May, with the first workers emerging as adults from the end of May until mid-June signalling the worker phase. The reproductives (new queens called gynes and males called drones) emerge from late July; mating usually from early August (i.e. the intermediate phase). After mating males die, females enter overwintering sites. The remaining colony dies during September with the death or inactivity of the queen. 

Nesting biology

The queen constructs the initial 'queen nest' and rears the first workers. These workers start to forage and carry out all the nest building and brood rearing activities. The first cells, in which the workers and most of the males are reared, are small (about 4 mm diameter). Later in the season larger cells (about 6 mm diameter) are built, in which the queens and a few males are reared. On average the mature nest consists of about 500 small and 500 large cells in three combs where about 450 workers, 180 males and 200 queens are reared. 

Flowers visited

According to Spradbery (1973), there are 23 species with which V. rufa can be associated with, including figwort, wild parsnip, black currant, gorse and cotoneaster.

Distribution

World distribution(GBIF)

Found throughout Ireland, England, Wales and Scotland as well as being also recorded from the Isle of Man, the Channel Islands, and the Outer Hebrides. Elsewhere, it is found in central and northern Europe besides being distributed across northern and central Asia from turkey to Japan and North America. 

Irish distribution

Unknown. 

Temporal change

Records submitted to Data Centre in 2019

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Further information


References

Publications

Archer, Michael E. (2012) Vespinae Wasps of the World: Behaviour, Ecology & Taxonomy of the Vespinae. Manchester: SIRI Scientific Press.

Archer, Michael E. (2014) The Vespid Wasps: (Tipiidae, Mutillidae, Sapygidae, Scoliidae and Vespidae) of the British Isles. York: Royal Entomological Society. 

Dvorák, L. & Roberts, S.P.M. (2006) Key to the paper and social wasps of Central Europe (Hymenoptera: Vespidae)Acta Entomologica Musei Nationalis Pragae 46: 221-244.



Bees, Wasps and Ants Recording Society: www.bwars.com (http://www.bwars.com/index.php?q=wasp/vespidae/vespinae/vespula-germanica)