Hornet Nest Research Articles

Microstructural properties of Asian hornet nest paper-like materials: Preliminary step towards biomimicry materials for civil engineering applications

This paper presents a comprehensive examination of the microstructure and mineralogy of the paper-like material found in Asian hornet nests (referred to as AHN P-LM) and the nearby tree leaves, utilising scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) and X-ray diffraction (XRD). The analysis conducted through SEM-EDS demonstrates that AHN P-LM is primarily composed of plant fragments, with slight traces of inorganic substances (such as CaOx). The thread-like morphologies observed in the SEM analysis, which are linked to the secretion of hornets, warrant attention due to their significance in understanding the microstructure of AHN P-LM. The presence of nitrogen (N) in the EDS analysis of AHN P-LM, in contrast to its absence in analysed leaves, strongly implies that the nitrogen originates from hornet saliva. Additionally, SEM-EDS analysis revealed the impact of chemical composition variations on colour differences within AHN P-LM. Furthermore, X-ray diffraction analysis on ash samples from AHN P-LM confirmed the presence of minerals such as quartz, lime, phlogopite, and microcline. These findings about mineral composition align closely with results obtained from SEM-EDS analyses, presenting various aspects related to understanding the structure and compositional makeup of AHN P-LM. Biomimicry principles can be applied to draw inspiration from the AHN P-LM for replication in the civil engineering field, facilitating innovative solutions. Understanding hornet behaviour and nest material composition is essential. Future outlook includes utilising these materials in wood construction, 3D printing for structural components, shelters, infrastructure repair, green building, and architectural innovation.

Tailored portable electrochemical sensor for dopamine detection in human fluids using heteroatom-doped three-dimensional g-C3N4 hornet nest structure

BackgroundThere is widespread interest in the design of portable electrochemical sensors for the selective monitoring of biomolecules. Dopamine (DA) is one of the neurotransmitter molecules that play a key role in the monitoring of some neuronal disorders such as Alzheimer's and Parkinson's diseases. Facile synthesis of the highly active surface interface to design a portable electrochemical sensor for the sensitive and selective monitoring of biomolecules (i.e., DA) in its resources such as human fluids is highly required. ResultsThe designed sensor is based on a three-dimensional phosphorous and sulfur resembling a g-C3N4 hornet's nest (3D-PS-doped CNHN). The morphological structure of 3D-PS-doped CNHN features multi-open gates and numerous vacant voids, presenting a novel design reminiscent of a hornet's nest. The outer surface exhibits a heterogeneous structure with a wave orientation and rough surface texture. Each gate structure takes on a hexagonal shape with a wall size of approximately 100 nm. These structural characteristics, including high surface area and hierarchical design, facilitate the diffusion of electrolytes and enhance the binding and high loading of DA molecules on both inner and outer surfaces. The multifunctional nature of g-C3N4, incorporating phosphorous and sulfur atoms, contributes to a versatile surface that improves DA binding. Additionally, the phosphate and sulfate groups' functionalities enhance sensing properties, thereby outlining selectivity. The resulting portable 3D-PS-doped CNHN sensor demonstrates high sensitivity with a low limit of detection (7.8 nM) and a broad linear range spanning from 10 to 500 nM. SignificanceThe portable DA sensor based on the 3D-PS-doped CNHN/SPCE exhibits excellent recovery of DA molecules in human fluids, such as human serum and urine samples, demonstrating high stability and good reproducibility. The designed portable DA sensor could find utility in the detection of DA in clinical samples, showcasing its potential for practical applications in medical settings.

Insects and the American Farmer: Crèvecœur's Response to Buffon's and Raynal's Theories of American Nature

J. Hector St. John de Crèvecœur's Letters from an American Farmer includes memorable scenes in which the farmer revives bees he has rescued from the craw of a king bird, and welcomes a hornet's nest inside his house. As I will argue, the book represented insects in a sentimental manner, as a retort to theories advanced by Guillaume-Thomas Raynal, and Georges-Louis Leclerc, comte de Buffon, that insects were noxious and overabundant in America. Insects played a key role in the late eighteenth-century controversy Antonio Gerbi called “the Dispute of the New World,” in which Crèvecœur's book weighed in to promote the North American colonies. In the collection of manuscript essays Crèvecœur presented to London publisher Davis and Davies in 1781, some described plagues ruining crops, or swarms biting colonists, but these texts were passed over, and not published until the 1920s. The article traces Crèvecœur's interactions with Buffon and with Raynal, who were variously rivals and mentors to him, as well as examining how the French-American soldier, farmer, author, and diplomat survived two revolutions and laid down principles today associated with sustainable agriculture.

Investigating the Architecture and Characteristics of Asian Hornet Nests: A Biomimetics Examination of Structure and Materials.

This study investigates the internal architecture of Asian hornet nests (AHNs) using advanced imaging techniques, such as CT scanning and X-ray radiography, to understand their construction and function. The primary objective and significance of this study centre on drawing inspiration from the creative way Asian hornets construct their nests, with a particular focus on the architecture, design, functionality, and building materials of these nests. The architectural principles governing the construction of these nests, such as the arrangement of hexagonal cells, pedicels for load bearing, and adhesive materials, serve as a source of inspiration for innovative and sustainable design practices. The pedicels in Asian hornet nests play a crucial role in transferring load and ensuring stability. Additionally, AHNs' adhesion to tree branches is essential for preventing collapse, and the pedicels provide necessary structural support. The knowledge gained from studying AHNs' internal architecture could be applied directly to the architecture and civil engineering fields to improve structure stability and durability. The microstructure analysis of the paper-like material that hornets produce to build their nests indicates a complex and heterogeneous structure, composed of various plant fragments and fibres. This unique composition creates intricate grooves and pores, which are essential for regulating temperature and humidity levels within the outer envelope of the nest. The study of Asian hornet nests' internal structure demonstrated that nature's engineering principles inspire the design of durable and resilient structures in the construction industry. Civil engineers can incorporate similar principles into their designs to enhance the structural integrity and performance of buildings, bridges, and other infrastructure.

Passive heat diffusion in nests with downward-facing cells: Implications for early colony development in social wasps

Social insects employ a variety of active and passive mechanisms for nest thermoregulation. Many social wasp species exhibit a particular nest-architecture by building their nests with cells facing downward. By using thermal imaging to characterize the heat diffusion throughout Oriental hornet nests from different angular positions, we show that the heat diffusion along the vertical gradient of nests is more efficient when the cell openings face downward than when facing sideways or upward, demonstrating the efficiency of this specific architecture in increasing the nest temperature. This passive thermoregulation mechanism could be especially important during the initial stage of the colony, when the queen is alone to rear her first brood. Among the social insects that build cells to raise their brood, we suggest that wasps can take advantage of the thermal benefits of this particular architecture of their cells as, unlike bees, they do not usually store food in them.

Pesticide contamination in an intensive insect predator of honey bees

Pesticides used for plant protection can indirectly affect target and non-target organisms and are identified as a major cause of insect decline. Depending on species interactions, pesticides can be transferred into the environment from plants to preys and predators. While the transfer of pesticides is often studied through vertebrate and aquatic exposure, arthropod predators of insects may represent valuable bioindicators of environmental exposure to pesticides. A modified QuEChERS extraction coupled with HPLC-MS/MS analysis was used to address the question of the exposure to pesticides of the invasive hornet Vespa velutina, a specialist predator of honey bees. This analytical method allows the accurate quantification of nanogram/gram levels of 42 contaminants in a sample weight that can be obtained from single individuals. Pesticide residues were analyzed in female workers from 24 different hornet nests and 13 different pesticides and 1 synergist, piperonyl butoxide, were identified and quantified. In 75 % of the explored nests, we found at least one compound and in 53 % of the positive samples we could quantify residues ranging from 0.5 to 19.5 ng.g−1. In this study, hornets from nests located in sub-urban environments were the most contaminated. Pesticide residue analysis in small and easy to collect predatory insects opens new perspectives for the study of environmental contamination and the transfer of pesticides in terrestrial trophic chains.

Molecular Identification of Asian Hornet Vespa velutina nigrithorax Prey from Larval Gut Contents: A Promising Method to Study the Diet of an Invasive Pest.

The Asian hornet, Vespa velutina nigrithorax (Hymenoptera: Vespidae), is an invasive hornet that was accidentally introduced into Europe in 2004. It mainly preys on other invertebrates and arthropod species, and often targets honey bee (Apis mellifera) colonies. The introduction of these hornets may damage indigenous fauna and apiculture. Knowledge of V. velutina prey preference and the species composition of their diet is relatively limited. In this study, we assessed methodologies for the molecular identification of prey using dissected larvae from destroyed nests. Ten larval samples were taken from five nests in areas where the hornets had not yet established: two from the Channel Islands and three in the mainland UK. DNA was extracted from the gut contents and sequenced and analysed by metabarcoding with Oxford Nanopore Technologies' Flongle and MinION devices. Numerous taxa were detected in each larval sample with the species composition varying by individual and by nest. Between 15 and 26 species were found per nest, with wasps (Vespula spp.), spiders, honey bees and blow flies being the most abundant taxa. These results demonstrate that metabarcoding larval gut contents can be used to study the Asian hornet diet and give a first snapshot of the prey items captured by V. v. nigrithorax in the UK. This method could be used for future large-scale testing of the gut contents of hornet nests, in order to provide a greater insight into the foraging behaviour of this predator across Europe and elsewhere.

The Trojan Women: A Comic

What is right with this “comic” of Euripides's timeless and irreplaceable drama, The Trojan Women, is what was always right about a play that is relentlessly relevant. Carson's translation, spare and clear, distills the language of the original but keeps what is important, including some mouth-puckeringly wry lines. There is barbed wit and heartbreaking lullaby, sometimes coinciding on one page. Thus, the chorus comments, “Troy, you made a bad deal: / ten thousand men for a single coracle of cunt appeal.” In the middle of the same page, the Greek herald Talthybius addresses Hector and Andromache's infant son Astyanax, whom he has come to carry off so that the baby can be thrown from the battlements: “Come along, little mushroom, / little rootlet, little sip, little milk fly, little asterisk, little welkin, / little silhouette, little sugar bubble—/ let go of your mother. / She's broken.” Then lower down on the same page: “It's time for your infinite leap / as decreed by the vote of men. / Take him. / The man to transact things like this / is one who doesn't know pity.”What is wrong with this new rendering is Bruno's awkward, amateurish drawings. Yes, the chorus are all animals, as are all the main characters except mad Cassandra (a partial exception might be made for Menelaus, who is some kind of machine); but Bruno is no Art Spiegelman, and this is no Maus. Spiegelman's cats, pigs, and mice make perfect sense and are elegantly and clearly depicted; they add resonance to the story without raising further questions. In this Trojan Women, it makes sense that Hecuba is an old bitch or Helen a svelte fox in high heels. Poseidon, a wave: okay. But Talthybius, a colossal raven? Athena, “a big pair of overalls, carrying an owl mask in one hand”? Andromache, “a poplar tree with trunk split and roots dragging out the back of the cart”? The infant Astyanax whom Andromache cradles in one Ent-like arm looks more like a cocoon or a hornet's nest or a hypertrophied oak gall than anything else. Menelaus, when he arrives, is “some sort of gear box, clutch or coupling mechanism, once sleek, not this year's model.” These surreal leaps might well work on the stage or screen, but the need to explain them in the text shows how uncomfortably they fit into the story. Carson's explanations, of course, constitute her only significant departures from Euripides.We do not need Bruno's drawings; Carson's pared-down text might work quite well on its own. But even grant the hypothetical that these drawings are an organic and crucial part of this version's vision, then the drawings should not need to be explained. Less would be more. What this version of the classic drama gains in succinctness it loses in tonal clarity—having said which, I would still like to try it out on my students, who might help me to change my mind. Does this retelling of the story remain heartrending and cruel, suffused with irony, sharpened by flashes of wit? Yes. Was it worth the experiment of turning the tragedy into a comic? Sure. Is this uneasy mix of verbal mastery and wobbly draftsmanship the ultimate version of The Trojan Women? Nope.

“Liberty or Death!”

“Liberty or Death!”

Patterns of food transfer in yellow-legged hornet nests revealed by heavy metal tracers

Patterns of food transfer in yellow-legged hornet nests revealed by heavy metal tracers

Features of Vespa affinis Nest Based on X-ray Diffraction, Spectroscopic, and Surface Morphological Studies

The main focus of this research is to ascertain the X-ray diffraction (XRD) pattern, Fourier transform infrared (FTIR) spectroscopic pattern, and surface morphology of a hornet (Vespa affinis) nest. The optical microscopic (OM) analysis demonstrated that the nest presented an irregular formation of partition materials. This was confirmed via scanning electron microscopy (SEM), which revealed the presence of a unique form with a honeycomb-like pattern. Meanwhile, the materials largely consisted of carbon and oxygen elements, as was revealed by the energy dispersive X-ray (EDX) analysis, while the XRD analysis indicated that the nest was composed of amorphous materials of cellulose and lignin. Finally, the (FTIR) spectroscopy analysis revealed the presence of a number of peaks, which indicated that the material also consisted of a mixture of cellulose, hemicellulose, and lignin materials. It is envisaged that these results would widen the possibilities of fundamental scientific research on forest products, particularly the use of the V. affinis nest for further biological and chemical research

Gathering in an empty house: Arthropod assemblages overwintering in abandoned hornet nests

AbstractAlthough some species of hornets spend enormous amounts of time constructing their nests, they only utilize the nest for one season and abandon it to overwinter in other habitats. Abandoned nests may be attractive habitats for other organisms to avoid predators and bad weather, but our knowledge of the organisms that make use of hornet nests for overwintering is very limited. Here, we examined the secondary inhabitants of abandoned winter hornet nests in northern part of Japan. A total of 96 live arthropods (5 orders, 23 species) were collected from six nests and were dominated by Araneae (85.4%). Our finding suggests that hornet nests serve as overwintering sites for many other organisms and that hornets may act as physical ecosystem engineers by creating overwintering habitats for other arthropods (mostly spiders). We predict that abandoned nests indirectly affect the prey community structure on trees, by providing overwintering sites for predatory spiders. In addition, reduced snow cover due to global warming may prevent nest collapse and enhance the ecological functioning of hornet nests. We emphasize that hornet nests present an ideal system for assessing how climate change alters communities through its effect on engineered structures. Further studies are required to clarify the role of hornets as ecosystem engineers among tree communities in fluctuating environments.

Older Preemies: How Their Fight Continues So Let's Do Better in the NICU.

Premature infants grow up and tell the survival in outcomes. From the heyday of neonatology, nurses have been instrumental in helping these babies survive and thrive enough to go home. Yet, families need coping mechanisms in dealing with the NICU trauma otherwise they will go home and treat their child as if everything is just fine. It isn't fine, and trauma, labels combine to create a hornet's nest of dysfunction in the family that ultimate erases that baby's long-term potential and affects them poorly for the rest of their lives. We need to do better.

Environmentally Friendly and Efficient Hornet Nest Envelope-Based Photothermal Absorbers.

Water shortage is a critical global issue that threatens human health, environmental sustainability, and the preservation of Earth’s climate. Desalination from seawater and sewage is a promising avenue for alleviating this stress. In this work, we use the hornet nest envelope material to fabricate a biomass-based photothermal absorber as part of a desalination isolation system. This system realizes an evaporation rate of 3.98 kg m–2 h–1 under one-sun illumination, with prolonged evaporation rates all above 4 kg m–2 h–1. This system demonstrates a strong performance of 3.86 kg m–2 h–1 in 3.5 wt % saltwater, illustrating its effectiveness in evaporation seawater. Thus, with its excellent evaporation rate, great salt rejection ability, and easy fabrication approach, the hornet nest envelope constitutes a promising natural material for solar water treatment applications.

Not just honeybees: predatory habits of Vespa velutina (Hymenoptera: Vespidae) in France

Summary Understanding the impact of a predatory invasive alien species requires data on its diet. Vespa velutina Lepeletier, 1836, is a notorious bee-hawking hornet accidentally introduced in France before 2004 which spread across the European continent. Despite numerous studies and the impact on beekeeping activities, there are very few data on the diet of this species in its invaded range in Europe. To fill this knowledge gap, we studied 16 nests in the south-west of France between 2008 and 2010. Using a combination of morphological and barcoding approaches, we identified 2151 prey pellets showing that V. velutina acts as a generalist predator, preying on honeybees (38.1%), flies (29.9%) and social wasps (19.7%), as well as a wide spectrum of animal organisms (no less than 159 species identified). The prey spectrum is influenced by the nest surroundings, urban colonies preying more on honeybees and forest colonies preying more on social wasps. The predation intensity reaches its peak in early October. By comparing the dry weight of prey pellets to that of V. velutina larvae and considering the colony dynamics, we estimated that a single hornet nest can consume on average 11.32 kg of insect biomass in one season. Overall, our results suggest that V. velutina is a generalist opportunistic predator targeting mostly locally abundant prey. While the species may have an impact on honeybees, its generalist, opportunistic behaviour on abundant insects suggests a minor impact on wild species. Instead, attempts to manage this species using non-selective traps have a much greater impact on wild and domesticated entomofauna than the hornet itself.

The Exocrine Chemistry of the Parasitic Wasp Sphecophaga orientalis and Its Host Vespa orientalis: A Case of Chemical Deception?

Simple SummaryThe wasp Sphecophaga orientalis is a parasitoid of the Oriental hornet (Vespa orientalis) in its subterranean colonies. We describe this parasitoid’s occurrence in hornet nests in Israel and compare the chemical composition of cuticular washes of both species. The dissimilarity between the two excludes the possibility that the parasite uses either camouflage or chemical mimicry to evade host aggression. Because the parasitoid features large amounts of the necrophoric compound oleic acid, we suggest that, due to this compound, the host considers the parasite as refuse and ignores its presence. The parasitoid head also contains rose oxide, a repellent, possibly used to repel aggressive workers and which, combined with its necrophoric odor, enables it to remain in the nest undisturbed.The main challenge facing a parasite of social insects lies in deceiving its host’s detection and defense systems in order to enter and survive within the host colony. Sphecophaga orientalis is an ichneumonid wasp that parasitizes the pupae of the Oriental hornet Vespa orientalis. In Israel’s Mediterranean region, this parasitoid infects on average 23.48% (8–56%) of the host pupal cells. Observation of colonies brought to the laboratory revealed that the parasite moves around within the colony without being aggressed by the host workers. To assess how the parasite evades host detection and defense, we compared the cuticular hydrocarbon (CHC) profiles of both species. There was little similarity between the parasite and the host workers’ CHC, refuting the hypothesis of chemical mimicry. The parasite’s CHCs were dominated by linear alkanes and alkenes with negligible amounts of branched alkanes, while the host workers’ CHCs were rich in branched alkanes and with little or no alkenes. Moreover, the parasite cuticular wash was markedly rich in oleic acid, previously reported as a cue eliciting necrophoric behavior. Since nests of Oriental hornets are typified by large amounts of prey residues, we suggest that, due to its unfamiliar CHCs and the abundance of oleic acid, the parasite is considered as refuse by the host. We also detected rose oxide in the parasitoid head extracts. Rose oxide is a known insect repellent, and can be used to repel and mitigate aggression in workers. These two factors, in concert, are believed to aid the parasite to evade host aggression.

Characterizing thermal tolerance in the invasive yellow-legged hornet (Vespa velutina nigrithorax): The first step toward a green control method.

The yellow-legged hornet, Vespa velutina nigrithorax (Hymenoptera: Vespidae, Lepeletier 1836), is native to Southeast Asia and has been unintentionally introduced in France. The species is spreading in many areas of the world. The European Union has classified V. velutina as a species of concern because the hornet significantly affects beekeeping activities, mostly by preying honeybees (Apis mellifera) at beehive entrances. No current control method is simultaneously eco-friendly and effective. Here, we aimed to develop a greener technique for destroying V. velutina nests, inspired by a defense behavior used by the eastern honeybee (Apis cerana), the “heat ball”. In the laboratory, we tested how V. velutina of different sexes, castes, and developmental stages responded to different heat exposure systems employing a range of temperature levels. Overall, the time of death decreased as temperature increased. Hornets died faster when the temperature was gradually increased than when it was instantaneously increased; larvae seemed to be more thermally tolerant. The most promising and potential technique for quickly destroying hornet nests may be steam injection, as the humid airflow system killed all hornets within 13 seconds, and therefore could be a good candidate for a green nest control method.

The Hornet's Nest pavilion - learning the challenges of full-scale construction from a digital model

In 2018, BuroHappold Engineering and Studio X of the Hochschule Anhalt Graduate School of Architecture in Dessau, Germany, collaborated on the design and construction of the Hornet's Nest, a parametrically designed, temporary, timber pavilion assembled without the use of mechanical connections. The collaboration was part of the graduate school’s approach to teaching design, combining virtual three-dimensional (3D) modelling with full-scale building projects to foster understanding of the challenges of full-scale construction from a digitally designed model.

Hornet's Nest

Hornet's Nest

Difficult-Access Rockfall Mitigation: Design and Construction Way Up High!

Rockfall mitigation projects frequently require work at elevated positions. This is not something that comes naturally for many engineers and geologists. Palms sweat, knees knock, and voices may start to crack — all of which is completely normal. But sometimes we need to work from elevated, remote locations in order to execute project work — to get to locations that are difficult to access and seem to tower above the rest of the world. On top of any fear of heights, there are other obstacles that can hamper progress in these locations, like dealing with protruding brush, flowing water, hornet nests, snakes, and falling materials (including rocks!).