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Keyhole wasp

Pachodynerus nasidens

A species of Pachodynerus

Pachodynerus nasidens, the keyhole wasp, is a species of stinging wasp in the family Vespidae.

Toxic to Animals
Toxic to Animals
General Info About Keyhole wasp
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Attributes of Keyhole wasp
Adult Food Sources
Nectar, pollen, fruit juices, plant exudates, honeydew
Larva Food Source
Caterpillars, beetle larvae, aphids, small insects, spider mites
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
The Keyhole wasp has special defensive behaviors that can trigger an allergic reaction. If there are serious reactions, seek IMMEDIATE medical attention.
Venomous
The Keyhole wasp can induce toxic reactions varying in severity. Nevertheless, these toxins primarily target their prey and predators and are usually not fatal to humans.
Non-poisonous
Not reported
Predatory
Not reported
Biting animal or pet
Yes
Mouthparts Type
Chewing-lapping mouthparts
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Life Cycle of Keyhole wasp
Egg The egg of keyhole wasp is typically oval-shaped and laid in a secure location. During this stage, the embryo develops within the egg, leading to the hatch of a larva.
Larva The larva of keyhole wasp emerges with a voracious appetite, focusing on growth. This stage is characterized by several molts, where it sheds its skin, but lacks adult features like wings.
Pupal During the pupal stage, keyhole wasp undergoes significant transformation within a protective cocoon. Its bodily structure changes completely, preparing for the final transition to adulthood.
Adult Emerging from the pupa, the adult keyhole wasp's development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Adult Keyhole wasp
Birds, spiders, rodents, reptiles, mantises
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Interesting Facts About Keyhole wasp
Keyhole wasp can build nests with small chambers, often found in the hollows of trees or crevices in walls, resembling miniaturized apartment complexes.
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Scientific Classification of Keyhole wasp
Tips for Finding Keyhole wasp
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Youth Habitat of Keyhole wasp
Urban and Suburban Areas, Deserts and Arid Regions, Forests and Woodlands, Agricultural and Cultivated Areas
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Habitat Preferences of Keyhole wasp Through Different Life Stages
The larvae of keyhole wasp are typically found in hollow stems or pre-existing cavities in wood where the females meticulously construct nests with mud. Searching for these larvae often involves inspecting these nest sites, which can frequently be found in sunny, sheltered areas such as the eaves of buildings or within garden debris. The adults prefer warm, dry environments and are frequently observed gathering building materials or nectar, often visible on flowers or buzzing around potential nesting sites. When actively seeking out the different developmental stages, one must search at different heights and microhabitats: larvae within protected nest chambers, and adults in more open, floral-rich foraging areas.
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When is the Best Time to Observe Keyhole wasp
The best time to find adult keyhole wasp is usually on warm, sunny days when they are most active. Mornings or late afternoons are often prime times for observing keyhole wasp as they forage or return to their nests.
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What is the Best Weather to Observe Keyhole wasp
Ideal weather conditions for locating keyhole wasp include a dry and warm climate without strong winds or rain, as these conditions are conducive to keyhole wasp activity and easier observation.
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How and Where Can You Find Keyhole wasp at Different Life Stages
Larva Larvae of keyhole wasp are typically found within the nesting sites, which are usually made in hollow stems or preexisting cavities. Search for these nests in areas such as woodpiles, stems of pithy plants, or even in mud dauber nests that have been abandoned.
Adult Adult keyhole wasp can often be seen visiting flowers, especially those that are flat and open, which makes it easier for them to access pollen and nectar. Look for adults in gardens, meadows, or anywhere flowering plants are abundant. Observing during sunny days will increase the likelihood of sightings, as keyhole wasp are more active in suitable weather conditions.
Are Keyhole wasp harmful?
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Are Keyhole wasp harmful to humans?

Keyhole wasp has a sting needle at the tail, which can sting people. But it is not aggressive and rarely attacks humans unless it is threatened. Even so, it should be treated with caution, because it will be very painful after being stung, and it will cause redness and swelling.
Harmful Effects of Keyhole wasp
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Toxic to Animals
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Toxic to Animals

Keyhole wasp uses its sting to defend itself or deter predators, resulting in mild toxicity to recipients of the sting. When humans or animals such as dogs and cats are stung, they typically experience temporary pain and minor swelling. Birds attempting to prey on keyhole wasp may also be deterred by this mechanism. Additionally, this organism can affect other insect species, including bees, sometimes leading to localized reactions or discomfort.

More Effects of Keyhole wasp

Beneficial Effects of Keyhole wasp
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Pollinator
Predators of Pests
Pollinator
Attract Plant Feature
Color, Smell
Keyhole wasp assists in plant pollination primarily by seeking out flowers for their pollen. Attracted by the vivid colors and enticing scents, keyhole wasp inadvertently collects pollen on its body while feeding. As it moves from flower to flower, it facilitates cross-pollination, although it does not have a specific plant preference.
Predators of Pests
Stage
Adults
Diets
Caterpillars
Keyhole wasp is an adept predator during its larval stage. It relies on preying upon caterpillars to feed its offspring. Adult keyhole wasp capture caterpillars, paralyze them, and then seal them into nesting chambers as a live food supply for their developing larvae. This process not only nourishes their young but also helps control caterpillar populations.
Common Questions People Also Ask
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