Mischocyttarus flavitarsis | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Vespidae |
Subfamily: | Polistinae |
Genus: | Mischocyttarus |
Species: | M. flavitarsis |
Binomial name | |
Mischocyttarus flavitarsis (Saussure, 1854) | |
Mischocyttarus flavitarsis is a social paper wasp found in western North America. Their nests can be found both in forests close to rivers or in close proximity to human life under the eaves of roofs. [1] Despite the fact that M. flavitarsis nests are frequently in close contact with humans, M. flavitarsis typically will not sting, but rather ram into the threatening individual. [2] Their colony cycle typically begins before May and will last until October. The queen will then seek a hibernation site for the winter. [1] Perched near female hibernation sites are males with whom the female will mate. The males have claimed their territory by rubbing sternal brushes along the border of the site, leaving a chemical that deters other individuals from approaching. [1] M. flavitarsis feed on arthropods, nectar, and animal carcasses and are often prey to birds, ants, and praying mantis. [1]
Henri Louis Frédéric de Saussure, a Swiss mineralogist and entomologist, classified M. flavitarsis in 1854. [3] The genus Mischocyttarus is the only genus in the tribe Mischocyttarini and is the second largest genus of social wasps. [3] [4] Mischocyttarus speciesare recognizable by the internal and external lobes of the tarsal segments. Additionally, mature larvae have an appendix-like process on their first abdominal sternum. [3]
Paper wasps typically have long and slender bodies with trailing hind legs. The color of their body is generally brownish. [5] Specifically, M. flavitarsis is divided into five races based on coloration. [1]
The nests of M. flavitarsis often hang from a 2–3 mm pedicle and are symmetrically round under the stem. Although rare, nests have been observed to be asymmetrically oblong or built on a vertical wall. The cells are sloping combs, and there are typically fewer than 300 cells per nest, making a relatively small nest per colony. [1] [6]
M. flavitarsis is found in the western United States and Canada, ranging from southern California to British Columbia. Typically, the wasps build nests in riparian forests at elevations of 1500 to 2700 meters. At lower elevations, the nests are located in deciduous and hard evergreens, and at higher elevations in conifers. Nests are typically found within 50 meters of rivers. [1] M. flavitarsis is also known to nest in the built environment, particularly in protected spaces such as wall voids, the underside of eves, etc.
Following hibernation, nests will be initiated between March and May by one or two foundresses or queens. During this period, cell construction is high as queens are laying eggs at a rate of 0.5 eggs per day. Construction by the queen slows down once eggs begin to hatch, but will increase again when pupae appear. If there are two foundresses for the colony, then one becomes the dominant egg-layer and leaves the nest less frequently than the other. Typically, the dominant queen will eat the eggs laid by the other foundress. [1]
Adults will begin to emerge about 60 days after eggs have been laid. Egg, larvae, and pupae stages each take around 20 days to complete development. Early emerging daughters help to construct the natal nest by building it larger and strengthening the stem from which it hangs. They also help to fan the brood to keep it cool and defend the nest against predators. After the adults are 10–15 days old, they begin to forage for fiber, arthropods, and nectar. A queen continues to forage through this stage but will leave the nest more rarely as adults emerge. If queens do leave the nest, it is typically only for construction materials for the nest. [1]
Foraging for the nest continues through August, and the adults that emerge at this time are typically males and non-worker females. However, egg-laying begins to slow down as temperatures begin to drop. The nest will be abandoned by M. flavitarsis between September and November as the females begin to seek shelter for hibernation. [1]
Female M. flavitarsis are capable of laying eggs, so dominance among females is established through physical attacks and oophagy. [3] The dominant female becomes queen and will eat the eggs of subordinates on the same day they are laid to direct reproduction. [7]
During the summer season, males can be found in female foraging areas attempting to mate. However, as fall approaches, males will begin to set up leks near female hibernation sites. [7] Fall mating occurs during September and October. Males will choose perch sites near areas frequented by females, sometimes changing sites up to 3 times per day. However, after six to seven days of waiting, the male will then remain at his perch site for the rest of the 6–7 weeks of mating. [1] Once a site is chosen, the male will drag his abdomen along the surface of the perch site for scent marking. [7]
When a female comes to mate, she lands on the perch site. The male will then either lunge or walk slowly toward the female. The male mounts the female for approximately 8 seconds and extends its curled antennae and draws the female antennae upward in a behavior called lassoing. Following mating, females will walk over the surface of the perch site, dragging their abdomens, before flying off. [1]
When another wasp attempts to land on an occupied perch site, the owner is alerted to the intruder. If the intruder does not fly away right away, then the owner will lunge and grapple the other wasp. Typically the two wasps will fight on the perch site and often fall off the site and land on the ground to finish fighting. Following the fight, the owner returns to its perch site, and again, rubs its abdomen to secrete its scent and ward off future intruders. [1]
A common practice of M. flavitarsis is nest usurpation, in which the queen is displaced by a subordinate daughter or foreign wasp, which will then become the queen of the colony. The replacement queen is defined as whoever becomes the primary egg-layer in the nest. Typically, nest usurpation takes place during the pre-emergence phase or early emergence phase because there are fewer adult wasps to deter the usurper. Attempts occur because the queen is away from the nest and disappears, or there is only one foundress to overthrow. When a usurper attacks, the two wasps fight by biting, using antennation, and grappling each other attempting to sting each other. If the queen is usurped, then sometimes the older daughters will follow the queen when she flees to start a new nest. Daughters that hatch following usurpation will work for the usurper-queen. [1]
M. flavitarsis will often forage along a stream in search of plant fibers to construct their nest, arthropods and nectar for feeding, and water for cooling the nest. Time spent away from the nest during foraging varies depending on what the wasp is looking for. When looking for pulp, a wasp will spend about 5 minutes away from the nest. A wasp searches for arthropods and nectar for about 15 minutes. Typically in the early stages of the nest when there are fewer adult wasps, they are away from the nest for a shorter amount of time. [1]
M. flavitarsis wasps are generalist predators, meaning their cues come from the many different insects and plants they feed on. Therefore, they use both visual and olfactory cues to find their prey. [8]
It has been found that M. flavitarsis wasps often use visual cues to locate their prey on leaves. Often, the larvae of caterpillars will be eaten by M. flavitarsis if they are on a damaged plant leaf. A leaf that is partially eaten by a caterpillar attracts the wasps due to its irregular shape. The wasp is more likely to approach a damaged leave with holes in the middle of the leaf rather than along the edge. [9]
M. flavitarsis wasps also locate prey by smell. In one study, holes were made in a leaf and placed near a plant that had holes made in its leaves twelve days prior. Once caterpillar larvae were placed on the leaf, the time for the wasp to locate the larvae was recorded. It was found that M. flavitarsis are more likely to approach the freshly damaged leaf, which release mechanical odors that serve as cues for the wasps. In studies, these wasps are more likely to approach a leaf based on olfactory cues, rather than visual cues. This shows that presented olfactory stimuli are processed before the wasp processes visual stimuli. [9]
Male M. flavitarsis have larger sixth, seventh, and eighth sternal glands than other wasps, suggesting a role in secretion and possible sexual attractant. [4] [10] Secretion is suggested because the wasps will often rub their abdomens along the nest, spreading a highly repellant substance to deter ants. The use of secretion is also used by males when trying to attract a female because they will rub their abdomen along the perimeter of their perching territory. [10] Near the openings of the glands are sternal brushes, which assist in rubbing the secreted substance along the surface. [4] Sternal brushes occur only in the M. flavitarsis of the Mischocyttarus genus. [7]
Due to the relatively cool and dry climate in which M. flavitarsis lives, it is the only species in the Mischocyttarus genus to hibernate and will seek shelter for the duration of the months of October through April. Typically, only female wasps will hibernate, with male wasps rarely being observed during the hibernation season. Female wasps will hibernate in cracks in eaves and roofs, cavities in electric light boxes, loose bark, logs, rocks, boxes, and attics. [1] Rarely, females will emerge on warm winter days to fly in the sun before returning to hibernate for the duration of winter. [2]
Typically, female M. flavitarsis will remain with its nest for the duration of their life. On the other hand, males remain on the natal nest for only a few days. Following departure from the colony, they spend the rest of their lives attempting to attract a mate. [7]
M. flavitarsis forage for arthropods like flies and caterpillars to feed to larvae. They will also feed upon fresh meat and hides of animals or fish. [2] Adult wasps will drink nectar for themselves, to feed to larvae, or to store in cells. [1]
Birds such as flickers, acorn woodpeckers, Mexican jays, and flycatchers are typical predators of M. flavitarsis. In addition to birds, ants will often try to invade the wasp nests. The wasps fight back by attempting to drive and throw the ants off the nest. They will also rub their abdomen on nest surfaces to deter ants from approaching. One final predator of M. flavitarsis is the praying mantis, which will eat perching males during mating season. [1]
The defensive behavior of M. flavitarsis is dependent on which phase the colony cycle is in. If the nest is in the emergence phase or later, M. flavitarsis are more likely to sting a predator or intruder as a form of altruistic suicide because of colony size. [1] However, typically the species is less prone to attack and will opt to ram the attacker as if to frighten it. [2] When disturbed, M. flavitarsis will stand high on their mid and hind legs with their forelegs and abdomen raised and antennae forward. They then show displeasure by buzzing their wings to produce a sound audible from several meters away. [1]
M. flavitarsis nests are often invaded by moths ( Chalcoela iphitalis ) at night because the wasps cannot see them. The moths migrate among the cells consuming wasp larvae and pupae. They will then lay their larvae, which spin cocoons in empty cells. M. flavitarsis do not attempt to rid the nest of the parasite. Instead, they will continue as a nest or abandon and renest elsewhere. [1]
Vespula pensylvanica, the western yellowjacket, is a Nearctic species of wasp in the genus Vespula. It is native to regions of North America, largely in areas with northern temperate climates. Its reproductive behavior is constrained by cold weather, which successfully reduces the number of western yellowjackets in cold months. However, in the absence of cold weather, this wasp's population can explode. The western yellowjacket has become particularly invasive in the Hawaiian Islands, resulting in their label as a major pest.
The eastern yellow jacket or eastern yellowjacket is a wasp found in eastern North America. Although most of their nests are subterranean, they are often considered a pest due to their nesting in recreational areas and buildings. This yellow jacket is a social insect, living in colonies of hundreds to thousands of individuals. Along with their subfamily, Vespinae, this species demonstrates supportive parental care for offspring, separation of reproductive and sterile castes, and overlapping generations. They aggressively defend their hives from threats and are known to inflict painful stings.
Polistes chinensis is a polistine vespid wasp in the cosmopolitan genus Polistes, and is commonly known as the Asian, Chinese or Japanese paper wasp. It is found in East Asia, in particular China and Japan. The subspecies P. chinensis antennalis is an invasive species in New Zealand, having arrived in 1979.
Polistes metricus is a wasp native to North America. In the United States, it ranges throughout the southern Midwest, the South, and as far northeast as New York, but has recently been spotted in southwest Ontario. A single female specimen has also been reported from Dryden, Maine. Polistes metricus is dark colored, with yellow tarsi and black tibia. Nests of Polistes metricus can be found attached to the sides of buildings, trees, and shrubbery.
Polistes fuscatus, whose common name is the dark or northern paper wasp, is widely found in eastern North America, from southern Canada through the southern United States. It often nests around human development. However, it greatly prefers areas in which wood is readily available for use as nest material, therefore they are also found near and in woodlands and savannas. P. fuscatus is a social wasp that is part of a complex society based around a single dominant foundress along with other cofoundresses and a dominance hierarchy.
The tree wasp is a species of eusocial wasp in the family Vespidae, found in the temperate regions of Eurasia, particularly in western Europe. Despite being called the tree wasp, it builds both aerial and underground paper nests, and can be found in rural and urban habitats. D. sylvestris is a medium-sized wasp that has yellow and black stripes and a black dot in the center of its clypeus. It is most common to see this wasp between May and September during its 3.5 month colony cycle.
Dolichovespula adulterina is a species of parasitic social wasp found in the Palearctic region. D. adulterina feeds on a variety of foods, including insects, spiders, arthropods, meat, molluscs, fruit, nectar, and larval secretions. D. adulterina was formerly considered to be synonymous with D. arctica from the Holarctic region, but more recent research indicates that D. arctica is a separate species.
Vespula squamosa, the southern yellowjacket, is a social wasp. This species can be identified by its distinctive black and yellow patterning and orange queen. This species is typically found in eastern North America, and its territory extends as far south as Central America. Within these territories, they create enormous, multiple-comb nests. The colonies may be either annual or perennial depending on the climate, and in many perennial nests, polygyny takes place. In addition, this species uses pheromones both as a sexual attractant and an alarm signal. This species feeds on insects and animal carcasses; it does not produce honey. V. squamosa, a social insect, has developed a parasitic relationship with the species V. vidua and V. maculifrons. Due to their painful, venomous stings, the species is considered a pest.
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Polistes nimpha is a eusocial paper wasp found all over Europe, with particular sightings in Turkey, Finland, Estonia, and Latvia. It is also found in northern Africa, Pakistan, Iran, India, Kazakhstan, Mongolia, and China. The climate in these areas is relatively cold and snowy in the winter, while summers are usually hot and dry, with steppe vegetation. Polistes nimpha colonies are relatively small and easily manipulated.
Belonogaster petiolata is a species of primitively eusocial wasp that dwells in southern Africa, in temperate or subhumid climate zones. This wasp species has a strong presence in South Africa and has also been seen in northern Johannesburg. Many colonies can be found in caves. The Sterkfontein Caves in South Africa, for example, contain large populations of B. petiolata.
Polistes biglumis is a species of social wasp within Polistes, the most common genus of paper wasp. It is distinguished mainly by its tendency to reside in montane climates in meadows or alpine areas. Selection pressure from the wasp's environment has led to several idiosyncrasies of its behavior and lifecycle with respect to its relative species in the genus Polistes. It alone among paper wasps is often polyandrous. In addition, it has a truncated nesting season that gives rise to unique competitive dynamics among females of the species. P. biglumis wasps use an odor-based recognition system that is the basis for all wasp-to-wasp interaction of the species. The wasp's lifecycle is highly intertwined with that of Polistes atrimandibularis, an obligate social parasite wasp that frequently invades the combs of P. biglumis wasps.
Mischocyttarus drewseni, which is sometimes spelled "drewsenii", is a social wasp in the family Vespidae. It is commonly found in Neotropical regions of South America, including Brazil, Peru, Venezuela, Colombia and Paraguay. This mid-sized wasp is about 1.5-1.8 cm and is typically dark brown or black in color. This species makes their nests out of woody plant fibers and create single combed nests with hexagonal cells which are typically found in low lying grass habitats or semi-urban environments. The colony cycle for this species is initiated by the queen who starts building the nest cell by cell. The nest construction process is highly elaborate and involves foraging for materials, creating cells, and heightening cell walls. It feeds on arthropods, plant nectar, and honeydew, and the species is very protective of its brood when it comes to defending them from their predators. The life cycle of this species has several stages with varying lengths, including egg, larval, pupal, and adult stages. As a social wasp species, there are several castes within the colony and different castes perform different specialized jobs with differing dominance and reproductive behaviors.
Protopolybia exigua is a species of vespid wasp found in South America and Southern Brazil. These neotropical wasps, of the tribe Epiponini, form large colonies with multiple queens per colony. P. exigua are small wasps that find nourishment from nectar and prey on arthropods. Their nests are disc-shaped and hang from the undersides of leaves and tree branches. This particular species of wasp can be hard to study because they frequently abandon their nests. P. exigua continuously seek refuge from phorid fly attacks and thus often flee infested nests to build new ones. The wasps' most common predators are ants and the parasitoid phorid flies from the Phoridae family.
Polybia sericea is a social, tropical wasp of the family Vespidae that can be found in South America. It founds its colonies by swarming migrations, and feeds on nectar and arthropods.
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Polistes erythrocephalus is a species of paper wasp in the subfamily Polistinae of family Vespidae found in Central and South America. P. erythrocephalus is a eusocial wasp, meaning that it possesses both reproductive and non-reproductive castes. The cooperation between the two castes to raise young demonstrates the altruistic nature of these wasps. P. erythrocephalus exhibits a four-stage colony cycle, as do many other Polistes wasps. This species generally feeds on larvae, occasionally their own, and is preyed upon by species such as army ants.
Mischocyttarus mexicanus is a New World species of paper wasp that exhibits facultative eusocial behavior and includes at least two subspecies living in the southern United States and Central America. This social wasp species is a good model for studying the selective advantage of different nesting tactics within a single species. M. mexicanus females can form nests both as individuals and as members of a colony, and are even known to switch between these two nesting strategies throughout their life, which is an unusual phenomenon in the field of social biology. Individuals in a colony have particular social roles that are plastic, as opposed to rigid castes, and brood parasitism and usurpation have been observed between unrelated conspecifics. They nest in a variety of types of plants and human constructions, although they have most frequently been observed in palm trees, and they are known to interact with a number of other species as prey, competitors over resources, or foragers.
Mischocyttarus mexicanus cubicola is a neotropical subspecies of paper wasp found in the New World. It is a social wasp that demonstrates two different types of nesting strategies, depending upon context. This context-dependent trait makes Mischocyttarus mexicanus cubicola a good model to study social biology within social wasps. In detail, this trait allows for the females of this species to form nests both individually and as co-founders with other females within the same colony. This subspecies is also known to exhibit cannibalism, with M. m. cubicola queens feeding on their own larvae for nourishment when unaided by workers.