Symmorphus
ExploreInsects
Symmorphus
symmorphus
The genus Symmorphus represents a fascinating group of solitary mason wasps within the family Vespidae. Rather than building large, communal paper nests like their social yellowjacket cousins, these industrious insects are solitary architects. Females seek out pre-existing tubular cavities, such as hollow plant stems or abandoned beetle galleries in dead wood, to craft individual nursery cells partitioned with meticulously gathered mud. Symmorphus wasps are highly beneficial to ecosystems and gardeners alike, as they are expert hunters of leaf-beetle and weevil larvae, helping keep pest populations in check. Watching a female Symmorphus diligently ferry mud and paralyzed prey back to her hidden nest offers a captivating glimpse into the hidden, complex lives of solitary wasps.
Habitat: Found in open woodlands, meadows, and gardens, often frequenting areas with flowering umbellifers, dead wood, and hollow-stemmed plants.
Appearance
Symmorphus wasps are slender, small-to-medium-sized insects, typically measuring between 6 to 12 millimeters in length. They display a stark, warning coloration of deep black with crisp, contrasting yellow or whitish bands across their abdomen and thorax. A distinguishing feature is their narrow waist or petiole, and like other vespids, they fold their dark-tinted wings longitudinally down their backs when resting. Viewed closely, they possess distinct longitudinal grooves on their midsection and have a noticeably more elongated, delicate body shape compared to chunkier social wasps.
KingdomAnimaliaPhylumArthropodaClassInsectaOrderHymenopteraFamilyVespidae
Category
InsectsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
A mother Symmorphus wasp behaves like a natural pest-controller, sometimes packing up to a dozen paralyzed beetle grubs into a single cell to ensure her baby has enough food.
The name 'mason wasp' comes from the female's habit of using mud to build secure walls between each egg chamber inside a hollow stem.
They will readily use artificial 'bee hotels' in backyard gardens, quickly moving into the small drilled holes intended for solitary bees.
Unlike social hornets or yellowjackets, Symmorphus wasps are solitary and do not have a colony to defend, making them extremely docile and unlikely to sting humans.
Special abilities
Ability
Mud Masonry
Females collect water and soil to mix mud, building sturdy partitions between individual brood cells inside hollow stems or beetle borings.
Ability
Venomous Paralysis
They possess a specialized sting that delivers a non-lethal, paralyzing venom to beetle larvae, keeping the prey fresh for their carnivorous offspring.
Ability
Wing Folding
When at rest, they fold their forewings longitudinally in half, an anatomical quirk characteristic of the Vespidae family that protects the wings from damage in tight spaces.
Measurements & details
- Length
- 0-1 cm
- Wingspan
- 1-2 cm
- Weight
- 0.00001-0.00005 kg
- Lifespan
- 1 years
- Top Speed
- 20 km/h
- Clutch Size
- 2-10
- Incubation
- 2-5 days
Diet & Feeding
Adults primarily feed on floral nectar for energy, but they actively hunt and paralyze beetle larvae to provision their offspring.
Age differences: Larvae are strictly carnivorous, feeding on paralyzed prey provided by the mother, whereas adults feed primarily on nectar.
Primary Foods
- Floral nectar
- Leaf beetle larvae
- Weevil larvae
Foraging Method
- Foraging
Ecological connections
mutualism
Wild Carrot
Daucus carota
Adults feed on the nectar of wild carrot, aiding in incidental pollination.
hunts
Poplar Leaf Beetle
Chrysomela populi
Females hunt leaf beetle larvae to feed their growing offspring.
parasite
Ruby-tailed Wasp
Chrysis ignita
Ruby-tailed wasps often parasitize Symmorphus nests, laying eggs inside the provisioned cells to steal the food.
Traits
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Also known as
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Safety
Danger
1/5 · Very low
No special safety notes yet.
Frequently Asked Questions
How long is Symmorphus?
0-1 cm
What is Symmorphus's wingspan?
1-2 cm
How much does Symmorphus weigh?
0.00001-0.00005 kg
How long does Symmorphus live?
1 years
How fast can Symmorphus move?
20 km/h
What does Symmorphus eat?
Adults primarily feed on floral nectar for energy, but they actively hunt and paralyze beetle larvae to provision their offspring.
Where is Symmorphus usually found?
Found in open woodlands, meadows, and gardens, often frequenting areas with flowering umbellifers, dead wood, and hollow-stemmed plants.
How does Symmorphus hunt?
Foraging
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