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Elm Leafminer
ExploreInsects
Elm Leafminer
Fenusa pusilla
The Elm Leafminer is a tiny insect that loves to munch on elm leaves. It makes little tunnels inside the leaves, which can look like tiny mazes! These insects are interesting to watch as they create their homes in the leaves.
Habitat: Urban areas
Appearance
The Elm Leafminer is a tiny, shiny black sawfly with an oval-shaped body and yellowish-white legs. Its wings are clear and membrane-like, often appearing slightly smoky. It can be visually differentiated from other small dark insects by its characteristic sawfly appearance, lacking the narrow 'wasp waist' of true wasps.
KingdomAnimaliaPhylumArthropodaClassInsectaOrderHymenopteraFamilyTenthredinidaeGenusFenusa
Category
InsectsRarity
Common
Danger
1/5 · Very low
Snaps
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Interesting facts
Each Elm Leafminer larva lives entirely hidden inside an elm leaf, eating its way through the middle!
Female leafminers use a special saw-like tool on their body to tuck their eggs right inside elm leaves!
These tiny insects are sawflies, not moths or beetles, making them distant relatives of wasps!
They spend the whole winter sleeping underground as pupae, waiting for spring to arrive!
Special abilities
Ability
Saw-like Ovipositor
Elm Leafminer has a special saw-like tool that helps them cut tiny slits into elm leaves to lay eggs safely inside.
Ability
Leaf Burrower
Elm Leafminer larvae can live and feed entirely inside an elm leaf, protected from many dangers because of their habitat.
Ability
Underground Sleeper
Elm Leafminers can spend the entire winter as pupae buried in the soil, safely waiting for spring because of this ability.
Measurements & details
- Wingspan
- 8-10 mm
- Size
- 4-5 mm
- Lifespan
- 7-14 days
- Flight Speed
- 7 km/h
- Leg Count
- 6
Diet & Feeding
Elm Leafminer larvae feast on the tender inner tissues of elm leaves, while adults may sip nectar.
Age differences: Larvae consume leaf tissue; adults are thought to feed sparingly on nectar or not at all.
Primary Foods
- Ulmus americana leaves
- Ulmus minor leaves
- Ulmus glabra leaves
- Ulmus pumila leaves
Foraging Method
- Null
Ecological connections
eats
American Elm
Ulmus americana
Larvae feast on the tender inner layers of its leaves.
eats
Field Elm
Ulmus minor
Their primary food source are the nutrient-rich tissues inside its leaves.
eats
Wych Elm
Ulmus glabra
Its leaves are a common food source for the developing larvae.
parasitizes
Ichneumonid Wasp
Adelognathus americanus
Its larvae develop inside the Elm Leafminer larvae.
Traits
Solitary
Solitary animals live alone for most of their lives, only interacting with others for mating or parental care.
Herbivorous
This trait characterizes organisms whose diet consists entirely or primarily of plant material.
Diurnal
Diurnal animals are primarily active during daylight hours, typically resting or sleeping at night.
Miniature
Pertaining to species that are significantly smaller than typical or average for their kind.
Urban Friendly
This habitat trait indicates species that can coexist with humans in urban and suburban environments, utilizing man-made structures and green spaces.
Pollinator
Describes organisms that transfer pollen, enabling the fertilization and reproduction of plants.
Also known as
No aliases listed yet.
Collections
Safety
Danger
1/5 · Very low
It's best to look at insects from a distance and not touch them.
Frequently Asked Questions
What is Elm Leafminer's wingspan?
8-10 mm
How big is Elm Leafminer?
4-5 mm
How long does Elm Leafminer live?
7-14 days
How fast can Elm Leafminer fly?
7 km/h
What does Elm Leafminer eat?
Elm Leafminer larvae feast on the tender inner tissues of elm leaves, while adults may sip nectar.
Where is Elm Leafminer usually found?
Urban areas
How does Elm Leafminer hunt?
Null
How many legs does Elm Leafminer have?
6
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