Lyla Lindsey
Wasp nests in Australia vary depending on the wasp species. Paper wasp nests, for example, are made of chewed-up wood and plant material, giving them a paper-like texture and appearance. They are often found hanging from sheltered locations, like the branches of trees or the eaves of buildings. Mud dauber and potter wasps, on the other hand, build their nests from mud, crafting them in circular motions to create familiar pottery shapes. These nests can be found in wall crevices or attached to trees. Some wasp species, like the European wasp, prefer underground nests in raised banks, while others dig burrows in the ground, resembling ant colonies or termite mounds. The shape and location of a wasp nest can provide clues to the species of wasp occupying it.
| Characteristics | Values |
|---|---|
| Location | Underground, in a cavity, or hung upside down from a sheltered location (e.g. under eaves of buildings or branches of trees) |
| Appearance | Hardened blob, miniature pottery, small vase, or honeycomb structure; made of paper, mud, or clay |
| Size | Varies; can be small or reach enormous sizes |
| Colour | Yellow and black stripes |
| Entrance | Single entrance hole |
| Construction | Built by chewing up wood and plant material, then mixing with saliva to form paper paste |
| Cells | Individual cells made of mud, with a single egg in each |
| Sound | Buzzing or vibrating |
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What You'll Learn
Paper wasp nests
Paper wasps are native to Australia and are found all over the country, except in Tasmania. They are considered less aggressive than European wasps and only attack humans if their nest is disturbed. However, they can deliver painful stings, and multiple stings may cause a severe systemic reaction. Therefore, it is advisable to steer clear of them.
Paper wasps get their name from the fact that they make their nests out of wood and plant material mixed with saliva to form a papery pulp. The nests are often hung from a sheltered location, such as the branches of trees or the eaves of buildings, and they can vary in shape and size. The nests consist of a series of individual, papery hexagonal cells that fit closely together, with each cell containing an egg and larva. These nests are often mistaken for bee nests, but bees use wax instead of paper to construct their cells.
The Ropalidia species of Australian paper wasp, for example, build a variety of different nest structures. Their nests may be found hanging in the roof of a cave or in a crowd of papery nests, each with dozens of hexagonal cells. Native paper wasp nests can also be found in high positions, such as tree branches or house eaves, and they are often left undisturbed as they help keep garden pests at bay.
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Potter wasp nests
Potter wasps are solitary insects that build nests out of mud. The nests are often located in sheltered spots, such as the eaves of buildings or in garages and outhouses. They can also be found in the roof of a cave or attached to a wall or tree.
The female potter wasp builds individual cells made of mud, into which she lays a single egg. She then collects prey, usually caterpillars, and pushes it into each cell to provide food for the larva. The larva slowly feeds on the prey, leaving the vital organs until last to ensure the prey doesn't decompose before the larva is ready to pupate.
The nests of potter wasps can be unsightly, and property owners often want to remove them and prevent them from being built. However, potter wasps are not known to be aggressive and do not sting frequently.
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Mud dauber wasp nests
Mud dauber wasps, also known as Sphecidae, are commonly encountered in Sydney and found throughout Australia. They are usually black or black and orange with bright yellow and dark black colouring. They live in forests, woodlands, urban areas, gardens, parks, and heaths. They are solitary wasps and are not aggressive, only stinging when handled or threatened.
Mud dauber wasps build their nests out of mud or clay, which they collect and use to construct a series of enclosed mud cells. The nests are often found in protected areas of houses, buildings, and rock overhangs, attached to walls or trees. The nests have a narrow "neck" and resemble a swallow's nest. Each nest contains several cells, each with an egg and a paralysed spider for the larva to feed on when it hatches. The female wasp hunts spiders, stings and paralyses them, and seals them in the nest with mud.
The nests can be easily removed by brushing or sweeping them away, but they are important for the ecosystem as mud dauber wasps are crucial native pollinators that control spider and bug numbers. They also help to reduce the number of agricultural pests. Therefore, it is recommended to leave the nests alone until the wasps abandon them.
Towards the end of summer, when the nests are at their largest, new queens and kings are produced, which fly off to mate. The developing young of mud dauber wasps remain in the pupal stage in the nest over winter, emerging in the spring.
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Wasp nests in horticultural areas
European wasp nests can be challenging to detect, especially when located underground, which is the case for around 80% of them. They are often found in raised banks, protected from flooding. The remaining nests are typically located in or on buildings or trees, with a single entrance point. These nests have a similar internal structure to Australian paper wasp nests but add an outer protective sheet of paper as they grow. Early detection of European wasp activity and nests is critical to preventing their establishment and spread.
In addition to European wasps, other wasp species in Australia include native paper wasps, mud dauber wasps, and potter wasps. Mud dauber and potter wasps are solitary species that build unsightly mud nests but are generally not aggressive and rarely sting. They are often tolerated or even welcomed by homeowners as they help control spider populations.
Native paper wasps, on the other hand, can be more defensive of their nests. Their nests are often found hanging under building eaves or in low garden shrubs. While they are not highly aggressive, they will attack if they perceive a threat to their nest. These wasps play an essential role in the environment, feeding on nectar and aiding in plant pollination. They also help control caterpillar populations, making them beneficial in vegetable gardens.
Overall, while wasp nests in horticultural areas can pose challenges, particularly with invasive species like European wasps, some native wasp species are important for maintaining ecological balance and can be considered assets in certain contexts.
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Wasp nests in aerial locations
Paper wasps, native to Australia, create nests that resemble papery hexagonal cells, often found in the roof of a cave or attached to a wall or tree. These nests are crafted from wood and plant material mixed with saliva, forming a paper paste. The nests comprise a series of individual cells where the queen lays her eggs, and the larvae develop and pupate. The adults rest on the outside of the nest, guarding against threats.
Mud dauber wasps, on the other hand, are solitary and build their nests from mud. Their nests tend to be messier, with mud coating the outside of the individual cells. These nests are often found in sheltered areas like eaves, garages, or outhouses. Similarly, potter wasps, another solitary species, use mud to construct their nests, forming well-defined individual cells that remain visible.
European wasps, an invasive species in Australia, are rarely seen in aerial locations, as 80% of their nests are underground. However, the remaining 20% can be found in or on buildings or trees. These nests have a similar internal structure to paper wasp nests but include an outer protective sheet of paper with a single entrance.
While wasp nests in aerial locations can be fascinating to observe, it is important to exercise caution and take safety precautions when dealing with them to avoid stings or other hazards.
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Frequently asked questions
Wasp nests in Australia can vary depending on the species. Paper wasp nests are made of chewed-up wood, giving them a paper-like texture and appearance. They are often found hanging upside down in sheltered locations. Mud dauber and potter wasps build nests out of mud, which can resemble small vases or other clay structures. Some wasp nests are underground, resembling ant colonies or termite mounds.
Wasp nests are often made of paper or mud, while bee nests are typically constructed with wax or mud. Wasp nests usually have a papery feel to them and may look like hardened blobs or cotton balls. Bee nests tend to have a more waxy appearance.
European wasp nests are often found underground in raised banks, protected from flooding. They can also be located in buildings or trees, with a single entrance hole leading to an inner structure resembling a beehive.
It is recommended to contact a professional pest control company, especially if the nest is out of reach. Different types of nests may require specific pesticides and methods of removal.
