Geographic Range
European paper wasps are native to the Palearctic Region around the Mediterranean,
northern Africa, southern Europe, the Middle East, and eastern China. They were introduced
to the Nearctic Region of North America in the 1970s and 1980s. Although initially
found primarily on the east coast of the United States, they have since spread into
the Midwest and recently towards the western and southwestern United States. European
paper wasps were introduced to Canada, including Ontario, Nova Scotia, and British
Columbia in the 1990’s. They have also been introduced to Chile and Argentina in the
Neotropical Region as well as western Australia in the Australian Region.
- Biogeographic Regions
- nearctic
- palearctic
- neotropical
- australian
Habitat
European paper wasps live in temperate and terrestrial habitats including chaparral,
forest and grassland biomes. They reside in urban, suburban, and agricultural locations.
They tend to reside close to human civilization because they nest in human structures.
They also live in forests and on plants where they can feed and nest. When nesting,
they choose spaces created by farm machinery and recreational structures. During winter,
impregnated queens reside in protected locations such as within house walls or in
hollow trees. These females then create nests in these locations or nearby at the
beginning of spring.
- Habitat Regions
- temperate
- terrestrial
- Terrestrial Biomes
- savanna or grassland
- chaparral
- forest
- Other Habitat Features
- urban
- suburban
- agricultural
Physical Description
European paper wasps are black wasps with yellow markings including rings along the
abdomen and spots located in various locations on the clupeus (face) and abdomen,
associated with gender and possibly dominance. Differences in the clypeal coloration
patterns may suggest aggression and status levels. Some individuals have one spot
on their clypeus, and a greater quantity of black on the clypeus may suggest dominance
and also indicate physical size. The flagella (antennae) are bright reddish-orange.
European paper wasps are smaller than the native
Northern paper wasps
and measure 2.0 cm in length on average. They are bilaterally symmetrical, and their
bodies are made up of tagmata including a head, thorax, and abdomen, with a thin constriction
between the thorax and abdomen. They have six legs, a pair of antenna, and a pair
of wings. There is an indentation located in the mesopleuron, as well as ridging along
the propodeum (the first abdominal segment that is fused to the thorax). Compared
to other species in their genus (
Polistes
), European paper wasps are known to fly with their hind legs positioned slightly
below their body.
Coloration and size exhibit sexual dimorphism. The ventral surface is black in females
and yellow in males. Females tend to be larger than males. Female forewing length
ranges from 9.5 to 13.0 mm, whereas males' forewings range from 8.5 to 12.0 mm.
- Other Physical Features
- ectothermic
- bilateral symmetry
- Sexual Dimorphism
- female larger
- sexes colored or patterned differently
Development
Metamorphosis takes place as eggs develop into larvae, which are fed by both the queen
and worker wasps that collect food. The larvae pupate and then transform into adults.
If the temperature and food conditions are optimal, the eggs develop into adults in
40 days. Vibrations caused by adult European paper wasps influences whether the developing
larvae become workers or founders. This vibration is caused by antennae drumming which
biochemically affects the larvae and alters gene expression in the larval stage.
Juvenile Hormone (JH) is found in many
Polistes
species and functions in regulating development, diapause, and reproduction. Whereas
in other species JH responsiveness may differ between foundresses and workers, in
European paper wasps, JH responsiveness is condition-dependent and there are no clear
differences in responsiveness between foundresses and workers.
- Development - Life Cycle
- metamorphosis
Reproduction
Within colonies of European paper wasps, one queen generally mates with multiple males.
Resident males often copulate with the female more often than transient males. Resident
males defend one landmark for a few consecutive days, while transient males may fly
between multiple landmarks. Their preferred landmarks are large trees. They may mark
their leaf and stem perches by rubbing their legs and last sternite (component of
the sternum on the ventral portion of the abdomen) on them. In choosing males, a queen
flies over the different males' territories and tends to choose a resident male because
residence often suggests that a male is large, aggressive, and sexually active. Once
the larvae develop, the workers assist the foundress in providing food for the larvae
through cooperative breeding.
Queen European paper wasps are more likely to copulate with non-nestmate males than
nestmate males. On the contrary, males do not discriminate between nestmate and non-nestmate
females. Females reject a significant number of copulation efforts by males. Females
are known to mate with several males, thus suggesting a form of post-copulatory choice
in the female.
- Mating System
- polyandrous
- cooperative breeder
- eusocial
European paper wasps are dioecious and copulate through internal sexual reproduction.
Females are iteroparous and mate throughout the spring, creating numerous broods.
In the fall, reproductive females mate one final time and find a place to take shelter
and hibernate for the winter. They store sperm post-copulation at the end of the season
which helps to delay fertilization until the spring. They reside in spaces within
houses, in walls, and outdoors. In April and May, they establish nests typically in
dark, protected locations. They often choose man-made structures to build nests, and
also protective rocks. European paper wasps nest in man-made structures more often
than northern paper wasps (
Polistes fuscatus
). Female wasps sometimes nest alone without other female foundresses. Alternatively,
females choose to nest with other fertilized females and create multiple-foundress
nesting sites. Occasionally, females choose to wait in their winter hibernation location
until later in the season, when they can take over a nest that has been abandoned
by another foundress. Foundresses attach their paper nests, constructed from wood
fibers and paper, to wood, metal, or rock. At the beginning of the season, the fertilized
female lays eggs within the few paper cells of the nest. Over the course of the season,
worker wasps help to reconstruct and increase the size of the nest.
Females lay eggs within cells of the nest that hatch, pupate, and develop into adults
in 3 to 4 weeks after they are laid. The eggs hatch into larvae in 3 to 5 days, and
the queen wasp feeds them masticated
caterpillars
. The larvae create a silk cap over the top of a nest cell and pupate within this
closed nest section. Within 3 to 4 weeks, the pupal wasps develop into full-sized
adults. As adult wasps develop, they become workers within the colony and are subordinate
to the female queen. In the summer and later part of the season, several dozen wasps
comprise the colony. These worker wasps help the foundress gather resources to feed
future larvae and construct sufficient nest space for them. Some of the workers become
reproductive males and females towards the end of the season. These wasps reproduce,
but fertilized females are the only wasps to survive the winter into the next season.
- Key Reproductive Features
- iteroparous
- seasonal breeding
- gonochoric/gonochoristic/dioecious (sexes separate)
- sexual
- fertilization
- oviparous
- sperm-storing
- delayed fertilization
Female European paper wasps protect and provision their offspring from before they
are fertilized until the weaning process. Eggs develop in their bodies until there
is a nest to lay them in. Once the eggs hatch, the foundress feeds the larvae chewed
up insects like caterpillars. The first brood of the season become worker wasps that
help to construct the nest and collect food for the following broods. The queen focuses
her energy on laying more eggs while the workers provide the necessary defense and
resources for the colony.
- Parental Investment
- female parental care
-
pre-fertilization
- provisioning
-
protecting
- female
-
pre-hatching/birth
-
provisioning
- female
-
protecting
- female
-
provisioning
-
pre-weaning/fledging
-
provisioning
- female
-
protecting
- female
-
provisioning
- post-independence association with parents
Lifespan/Longevity
The lifespan of the queen wasp is longer than worker because workers protect the queen
and she hibernates during the winter. Colonies with one or more queens are founded
in late March or April. These initially start with the single or multiple foundresses
that were fertilized in the fall. They lay their eggs, which eventually develop into
the first set of workers of the season. Neither males nor non-reproductive females
survive the winter; their lifespan is less than a year. They only survive the spring,
summer, and fall seasons. Reproductive females may survive multiple seasons.
Behavior
European paper wasps are mobile and move by flying and walking. They are social and
live in colonies that have dominance hierarchies between the queen and the workers,
including hierarchies within the working wasps. Among the workers, four typical behaviors
occur. These include: general movement and behavior on the nest, searching for prey,
further construction of the nest, and sitting on the nest. European paper wasps are
diurnal and return to the nest for the night.
Since aggressive behaviors are costly, having a distinctive facial phenotype for clypeal
coloration may decrease the level of competition from other wasps. European paper
wasps may be more likely to challenge a weaker rival based on its clypeal pattern.
Female queens are fertilized in the fall, go into hibernation, and produce eggs in
the early spring. Once these eggs become adults after 3 to 4 weeks, they become workers
within the colony and are subordinate to the female queen. In the summer and later
part of the season, several dozen wasps compose the colony. Within wasp colonies,
the first born wasps of a brood may be the ones that become an integral part of the
colony, whereas wasps born later in the brood may have lower social status or may
be excluded from the colony. In small colonies, the workers besides the initial six
from a brood often have little interaction with higher ranked wasps.
A fertilized female European paper wasp that starts a colony during the spring builds
a nest along with the help of her first brood of offspring. The wasps continue to
use this nest throughout the season although they add to it as the colony gets larger.
The following season the fertilized female, whether the same or different individual
from the previous year, establishes a new nest and rarely returns to the nest of the
previous year. Foundresses visit significantly less area on the comb than workers.
Each wasp visits roughly 12% of the comb surface within a day regardless of the total
time that they spend on the nest that day. While workers visited on average 52% of
the comb surface over many days, foundresses only visited 50%.
- Key Behaviors
- flies
- diurnal
- motile
- hibernation
- social
- colonial
- dominance hierarchies
Home Range
There is little information about the home range of European paper wasps.
Communication and Perception
Recognition between European paper wasp individuals increases the level of cooperation
and simultaneously decreases the level of aggression between wasps. However, there
may be no individual recognition bbecause quantities of aggressive behaviors are the
same regardless of whether the wasps have met before or not.
In order to differentiate between nestmates and non-colony members, European paper
wasps may rely on isolated cuticular hydrocarbons located on the epicuticle, the outside
waxy layer of the cuticle. These hydrocarbons serve as a chemical identification signal
for individuals to discriminate between members of their colony and other colonies.
However, polar compounds located on the epicuticle do not play a role in this identification.
European paper wasps use tactile communication in two forms of dominance behavior:
mounting and boxing. The more extreme form, mounting, involves a more dominant wasp
drumming his or her antennae on another wasp's head, resulting in the recipient wasp
lowering its head and antennae in response. Boxing consists of a wasp using its front
legs to bat at another wasp and grappling with it by curling and spiraling its body
around its opponent to try to gain dominance. European paper wasps also lightly bat
other wasps’ heads with their antennae or drum on their abdomens as a more subtle
form of analyzing them.
- Other Communication Modes
- vibrations
- Perception Channels
- visual
- tactile
- vibrations
- chemical
Food Habits
European paper wasps are omnivorous, but sometimes predatory, feeding on insect larvae
and caterpillars. They also consume
aphids
, honeydew, and nectar from flowers. European paper wasps consume a wider variety
of insects than
northern paper wasps
, which specialize in caterpillars.
- Animal Foods
- insects
- Plant Foods
- fruit
- nectar
Predation
European paper wasps look similar to other species in the genus, which may make it
difficult for predators to discern between two species.
Ecosystem Roles
Both native and introduced colonies of European paper wasps play a role in pollinating
plants. They also consume insects, particularly caterpillars, as both adults and larvae.
In certain areas where European paper wasps are an introduced species, there are significant
concerns regarding its effects on the native
Northern paper wasp
. Since European paper wasps establish their nests before native species in the spring,
they can expand their colonies without significant competition. By nesting early in
the season, they avoid bird predators, thereby increasing their survival rate and
the likelihood that early broods survive and develop into workers that can protect
larvae. Unlike native members of their genus (
Polistes
), European paper wasps consume caterpillars as well as other foods, and their varied
diet benefits larval development due to increased nutritional variation. Their reproductive
success may have negative effects on native (
Polistes
) species populations, as well as other insects.
Native European paper wasps in the Mediterranean are often infected by parasitoids
including
Endurus argiolus
and
Xenos vesparum
. Adult parasitoids lay eggs on or inside of a host organism, which eventually hatch
into larvae that infect, sterilize, and sometimes kill their hosts. These North American
parasitoids do not generally infect European paper wasps in the United States because
they do not recognize them as hosts based on their recent introduction. Wolbachia
is a parasitic microbe bacteria that infects male and female European paper wasps
in both Italy and northeastern United States.
- Ecosystem Impact
- pollinates
- bacteria ( Wolbacia )
- parasitoid insects ( Xenos vesparum )
- parasitoid wasps ( Endurus argiolus )
Economic Importance for Humans: Positive
European paper wasps pollinate plants, thereby benefiting humans. They help control
insects such as caterpillars,
hornworm larvae
,
cabbageworms
,
tent caterpillars
, and larvae of sawfly families
Cimbicidae
,
Diprionidae
, and
Tenthredinidae
.
- Positive Impacts
- pollinates crops
- controls pest population
Economic Importance for Humans: Negative
European paper wasps sting humans and other animals when they get too close to their
nests. Additionally, native wasp species may be threatened by them, which could eventually
affect the fauna in the area. European paper wasps choose to nest in man-made structures
more often than other species in their genus (
Polistes
) and thus people often resort to using pesticides or other techniques to kill the
wasps and remove the nests.
- Negative Impacts
-
injures humans
- bites or stings
Conservation Status
European paper wasps are not threatened or endangered.
Additional Links
Contributors
Eliza Stout (author), University of Michigan-Ann Arbor, Catherine Kent (editor), Special Projects.
- Nearctic
-
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
- introduced
-
referring to animal species that have been transported to and established populations in regions outside of their natural range, usually through human action.
- Palearctic
-
living in the northern part of the Old World. In otherwords, Europe and Asia and northern Africa.
- native range
-
the area in which the animal is naturally found, the region in which it is endemic.
- Neotropical
-
living in the southern part of the New World. In other words, Central and South America.
- introduced
-
referring to animal species that have been transported to and established populations in regions outside of their natural range, usually through human action.
- Australian
-
Living in Australia, New Zealand, Tasmania, New Guinea and associated islands.
- introduced
-
referring to animal species that have been transported to and established populations in regions outside of their natural range, usually through human action.
- temperate
-
that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).
- terrestrial
-
Living on the ground.
- tropical savanna and grassland
-
A terrestrial biome. Savannas are grasslands with scattered individual trees that do not form a closed canopy. Extensive savannas are found in parts of subtropical and tropical Africa and South America, and in Australia.
- savanna
-
A grassland with scattered trees or scattered clumps of trees, a type of community intermediate between grassland and forest. See also Tropical savanna and grassland biome.
- temperate grassland
-
A terrestrial biome found in temperate latitudes (>23.5° N or S latitude). Vegetation is made up mostly of grasses, the height and species diversity of which depend largely on the amount of moisture available. Fire and grazing are important in the long-term maintenance of grasslands.
- chaparral
-
Found in coastal areas between 30 and 40 degrees latitude, in areas with a Mediterranean climate. Vegetation is dominated by stands of dense, spiny shrubs with tough (hard or waxy) evergreen leaves. May be maintained by periodic fire. In South America it includes the scrub ecotone between forest and paramo.
- forest
-
forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.
- urban
-
living in cities and large towns, landscapes dominated by human structures and activity.
- suburban
-
living in residential areas on the outskirts of large cities or towns.
- agricultural
-
living in landscapes dominated by human agriculture.
- metamorphosis
-
A large change in the shape or structure of an animal that happens as the animal grows. In insects, "incomplete metamorphosis" is when young animals are similar to adults and change gradually into the adult form, and "complete metamorphosis" is when there is a profound change between larval and adult forms. Butterflies have complete metamorphosis, grasshoppers have incomplete metamorphosis.
- polyandrous
-
Referring to a mating system in which a female mates with several males during one breeding season (compare polygynous).
- cooperative breeder
-
helpers provide assistance in raising young that are not their own
- eusocial
-
the condition in which individuals in a group display each of the following three traits: cooperative care of young; some individuals in the group give up reproduction and specialize in care of young; overlap of at least two generations of life stages capable of contributing to colony labor
- iteroparous
-
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
- seasonal breeding
-
breeding is confined to a particular season
- sexual
-
reproduction that includes combining the genetic contribution of two individuals, a male and a female
- fertilization
-
union of egg and spermatozoan
- internal fertilization
-
fertilization takes place within the female's body
- oviparous
-
reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.
- sperm-storing
-
mature spermatozoa are stored by females following copulation. Male sperm storage also occurs, as sperm are retained in the male epididymes (in mammals) for a period that can, in some cases, extend over several weeks or more, but here we use the term to refer only to sperm storage by females.
- delayed fertilization
-
a substantial delay (longer than the minimum time required for sperm to travel to the egg) takes place between copulation and fertilization, used to describe female sperm storage.
- female parental care
-
parental care is carried out by females
- diurnal
-
- active during the day, 2. lasting for one day.
- motile
-
having the capacity to move from one place to another.
- hibernation
-
the state that some animals enter during winter in which normal physiological processes are significantly reduced, thus lowering the animal's energy requirements. The act or condition of passing winter in a torpid or resting state, typically involving the abandonment of homoiothermy in mammals.
- social
-
associates with others of its species; forms social groups.
- colonial
-
used loosely to describe any group of organisms living together or in close proximity to each other - for example nesting shorebirds that live in large colonies. More specifically refers to a group of organisms in which members act as specialized subunits (a continuous, modular society) - as in clonal organisms.
- dominance hierarchies
-
ranking system or pecking order among members of a long-term social group, where dominance status affects access to resources or mates
- visual
-
uses sight to communicate
- tactile
-
uses touch to communicate
- chemical
-
uses smells or other chemicals to communicate
- vibrations
-
movements of a hard surface that are produced by animals as signals to others
- visual
-
uses sight to communicate
- tactile
-
uses touch to communicate
- vibrations
-
movements of a hard surface that are produced by animals as signals to others
- chemical
-
uses smells or other chemicals to communicate
- carnivore
-
an animal that mainly eats meat
- insectivore
-
An animal that eats mainly insects or spiders.
- herbivore
-
An animal that eats mainly plants or parts of plants.
- frugivore
-
an animal that mainly eats fruit
- nectarivore
-
an animal that mainly eats nectar from flowers
- omnivore
-
an animal that mainly eats all kinds of things, including plants and animals
- ectothermic
-
animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature
- bilateral symmetry
-
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
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