Paper wasp

Paper wasps
A young paper wasp queen (Polistes dominula) starting a new colony
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Suborder: Apocrita
Family: Vespidae
Subfamily: Polistinae, Stenogastrinae, or Vespinae
paper wasps (Polistes major) at the P.B. County SWA Greenway Trail

Paper wasps are 0.7 to 1.0 inch (1.8 to 2.5 cm) long wasps that gather fibers from dead wood and plant stems, which they mix with saliva, and use to construct water-resistant nests made of gray or brown papery material. Paper wasps are also sometimes called umbrella wasps, due to the distinctive design of their nests.[1]

European paper wasp laying an egg (Polistes dominula)

Species

The name "paper wasps" typically refers to members of the vespid subfamily Polistinae, though it often colloquially includes members of the subfamilies Vespinae (hornets and yellowjackets) and Stenogastrinae, which also make nests out of paper. Twenty-two species of Polistes paper wasps have been identified in North America and approximately 300 species have been identified worldwide. The most common paper wasp in Europe is Polistes dominula.[2] The Old World tribe Ropalidiini contains another 300 species, and the neotropical tribes Epiponini and Mischocyttarini each contain over 250 more, so the total number of true paper wasps worldwide is about 1100 species, almost half of which can be found in the neotropics.

Nests

Paper wasps on part of a large nest, in California

The nests of most true paper wasps are characterized by having open combs with cells for brood rearing, and a 'petiole', or constricted stalk, that anchors the nest.[3] Paper wasps secrete a chemical which repels ants, which they spread around the base of the anchor to prevent the loss of eggs or brood.

Most social wasps of the family Vespidae make nests from paper, but some stenogastrine species, such as Liostenogaster flavolineata, use mud. A small group of eusocial crabronid wasps, of the genus Microstigmus (the only eusocial wasps outside the family Vespidae), also constructs nests out of chewed plant fibers, though the nest consistency is quite different from those of true paper wasps, due to the absence of wood fibers, and the use of silk to bind the fibers.[4]

Nests can be found in sheltered areas, such as the eaves of a house, the branches of a tree, on the end of an open pipe, or on an old clothesline. Some species, such as "Ropalidia romandi", will vary their nest architecture depending on where they build their nest.[5]

Three species of Polistes are obligate social parasites, and have lost the ability to build their own nests, and are sometimes referred to as "cuckoo paper wasps". They rely on the nests of their hosts to raise their brood.[6]

Behavior

Unlike yellowjackets and hornets, which can be very aggressive, polistine paper wasps will generally only attack if they themselves or their nest are threatened, but may still sting even if unprovoked.[7] Since their territoriality can lead to attacks on people, and because their stings are quite painful and can produce a potentially fatal anaphylactic reaction in some individuals, nests in human-inhabited areas may present an unacceptable hazard.[8]

Paper wasp on a spider lily leaf – they are considered beneficial by gardeners.

Most wasps are beneficial in their natural habitat, and are critically important in natural biocontrol.[3] Paper wasps feed on nectar and other insects, including caterpillars, flies, and beetle larvae. Because they are a known pollinator and feed on known garden pests, paper wasps are often considered to be beneficial by gardeners,[8] however in turn they are also considered pests as well.

In some species, the size of the body and color intensity can be used as an index of the amount of toxin of an individual wasp. Individuals with high color intensity and large body produce more toxin (used as defense against predatory vertebrates like wolves, cats, and birds).

See also

References

  1. ↑ "Paper Wasp" Microsoft Encarta Online Encyclopedia 2006.
  2. ↑ James M. Carpenter. "Distributional checklist of the species of the genus Polistes (Hymenoptera: Vespidae; Polistinae, Polistini)". Retrieved 2009-02-09.
  3. 1 2 Lyon, W.F. and G.S. Wegner (1991). Paper Wasps and Hornets Ohio State University Extension Fact Sheet: Entomology
  4. ↑ Matthews, R. W.; Starr, C. K. (1984). "Microstigmus comes Wasps have a Method of Nest Construction Unique Among Social Insects". Biotropica. 16 (1): 55–58. doi:10.2307/2387895.
  5. ↑ Yamane, Soichi; Ito, Yosiaki (1994). "Nest Architecture of the Australian Paper Wasp Ropalidia Romandi Cabeti , With a Note on its Developmental Process (Hymenoptera: Vespidae)". Psyche. 101 (3-4). doi:10.1155/1994/92839.
  6. ↑ Dapporto L, Cervo R, Sledge MF, Turillazzi S (2004) "Rank integration in dominance hierarchies of host colonies by the paper wasp social parasite Polistes sulcifer (Hymenoptera, Vespidae)". J Insect Physiol 50 :217–223
  7. ↑ Felixson, Carol (undated). "Paper wasps work together." Retrieved 2009-04-26 from "L.A. Times" at http://www.latimes.com/features/kids/readingroom/la-et-kidcal5mar06,1,7872696.story.
  8. 1 2 Drees, B.M. and John Jackman (1999). Field Guide to Texas Insects. Gulf Publishing Company, Houston, Texas. Excerpt available at: Texas Cooperative extension
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