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Robber fly

Robber fly

Triorla interrupta

A species of Triorla

The robber fly (Triorla interrupta) is a bold insect that is known to take on insects much larger than itself for food. This follows suit with other robber flies who are incredibly aggressive and predatory. It also has dark dashes along its abdomen. It also likes to run around grassy areas. 

General Info About Robber fly
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Attributes of Robber fly
Colors
Brown
Black
Habitat
open, grassy area
Adult Food Sources
Bees, flies, butterflies, moths, grasshoppers
Larva Food Source
Small arthropods, insect larvae, eggs of other insects
Non-poisonous
The Robber fly is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
The Robber fly typically preys on other arthropods and does not directly affect plants.
Biting animal or pet
Yes
Mouthparts Type
Piercing-sucking mouthparts
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Species Status of Robber fly
It is found in North America.
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Distribution Area of Robber fly
United States
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Predators of Robber fly Larvae
Birds, rodents, spiders, insects
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Predators of Adult Robber fly
Birds, rodents, spiders, insects
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Interesting Facts About Robber fly
Robber fly can immobilize prey with a paralyzing venom, allowing them to consume their meal at leisure.
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Scientific Classification of Robber fly
Class
Bugs
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Order
Flies
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Genus
Triorla
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Tips for Finding Robber fly
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Youth Habitat of Robber fly
Forests and Woodlands, Grasslands and Prairies, Urban and Suburban Areas
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Adult Habitat of Robber fly
Forests and Woodlands, Grasslands and Prairies, Deserts and Arid Regions, Urban and Suburban Areas, Agricultural and Cultivated Areas
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When is the Best Time to Observe Robber fly
Robber fly is typically more active during daylight hours, making morning to late afternoon the optimal time for observation and capture.
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What is the Best Weather to Observe Robber fly
Robber fly prefers warmer, drier weather conditions for hunting and is less active during cold or rainy periods.
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How and Where Can You Find Robber fly at Different Life Stages
Larva Robber fly larvae are often found underground or in decaying organic matter. Search for them by carefully digging in soil near the known habitats of their prey.
Pupal Robber fly pupae may be located in soil or under debris near the site where the larva was last active. Look for pupal cases by sifting through loose soil and leaf litter.
Adult Robber fly adults are swift fliers and can be seen patrolling for prey in open, sunny areas. They often perch on high vantage points, so searching along paths and clearings in their habitats can lead to sightings.
Are Robber fly harmful?
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Beneficial Effects of Robber fly
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Predators of Pests
Predators of Pests
Stage
Adults
Purpose
Feed Itself
Robber fly is a formidable predator commonly found darting through sunlit clearings in search of prey. In its adult stage, robber fly employs acute vision and rapid flight to pursue and capture various insects. Its hunting serves the purpose of feeding itself, sustaining its energy for survival and reproduction. A lesser-known fact about robber fly is that they exhibit prey preference, often targeting flying insects like bees and wasps due to their size and nutritional value.
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