Hover Fly

🔬

PestControlBasics Editorial Team

Reviewed by Derek Giordano · Updated 2026

Illustrated identification guide — PestControlBasics.com

🔍 Identification

Adults: 8-15mm; yellow and black banded (bee mimic — completely harmless); can hover motionless (distinctive behavior); single pair of wings (flies); no stinger. Larvae: maggot-like; legless; found in aphid colonies; semi-transparent with visible internal anatomy. Multiple species; most have bee-mimicking patterns that provide protection from predators.

🧬 Biology & Behavior

Female hover flies lay eggs directly inside aphid colonies. Larvae emerge and consume aphids continuously — one larva can eat 400+ aphids during development. Adults feed on pollen and nectar — they're important pollinators for many plants that bees underserve. Hover flies are present whenever aphid populations exist, providing natural biological control before populations explode.

⚠️ Damage & Health Risk

Zero — highly beneficial at both adult (pollinator) and larval (aphid predator) stages.

🔧 DIY Treatment

Plant flowering herbs (dill, fennel, yarrow, phacelia) near aphid-prone crops — these attract adult hover flies to lay eggs in aphid colonies. Avoid broad-spectrum sprays that kill larvae in aphid colonies.

👷 When to Call a Pro

Never warranted — encourage and protect.

❓ FAQ

Do hover flies sting?

No — hover flies are harmless flies with no stinger. The yellow and black banding is Batesian mimicry — they look like bees or wasps to deter predators but have no defensive capability. If you're not sure whether a yellow-and-black flying insect is a wasp or a hover fly, watch it: hover flies hover motionless; wasps don't.

How do I attract more hover flies?

Plant early-blooming and late-blooming native flowering plants near your vegetable garden. Umbellifer flowers (dill, fennel, cilantro in flower, yarrow, Queen Anne's lace) are particularly attractive to hover flies. Allowing some herbs to bolt (flower) in spring creates an early season resource when hover fly populations are building.

Factor	Details
U.S. Range	All or most U.S. states
Regional Detail	Distribution varies — consult your local extension service for regional prevalence data.

Factor

Details

U.S. Range

All or most U.S. states

Regional Detail

Distribution varies — consult your local extension service for regional prevalence data.

📅 Treatment Timing Guide

Treating at the right time dramatically improves results. Pest control timed to the life cycle uses less product and achieves better long-term control.

Period	Action
Spring	Inspection and perimeter treatment before pest season starts.
Summer	Active monitoring and targeted treatments as needed.
Fall	Preventive treatment before overwintering pests seek entry.

Period

Action

Spring

Inspection and perimeter treatment before pest season starts.

Summer

Active monitoring and targeted treatments as needed.

Fall

Preventive treatment before overwintering pests seek entry.

💰 Professional Treatment Costs

Service Type	DIY Cost	Professional Cost
Initial inspection	Free (self-inspect)	$75–$150 (often credited to treatment)
One-time treatment	$30–$100 in materials	$150–$500
Annual service contract	N/A	$400–$900/year
Severe infestation	Often ineffective alone	$500–$2,500+

Service Type

DIY Cost

Professional Cost

Initial inspection

Free (self-inspect)

$75–$150 (often credited to treatment)

One-time treatment

$30–$100 in materials

$150–$500

Annual service contract

N/A

$400–$900/year

Severe infestation

Often ineffective alone

$500–$2,500+

Prices vary by region, property size, and infestation severity.

❓ Common Questions About Hover Fly / Drone Fly

How do I confirm I actually have this pest (not something similar)?

The most reliable confirmation is a physical specimen — capture one and compare to reference images on this page. For cryptic pests (bed bugs, termites), look for secondary signs: frass, shed skins, mud tubes, or bites with a specific pattern. When uncertain, a professional inspection is faster than months of misidentification.

Can I treat this myself or do I need a professional?

DIY is effective for small, accessible infestations caught early. Professionals are worth the cost when: the infestation is inside wall voids or structural elements, multiple rooms are affected, you have health-risk pests (hantavirus, venomous species), or DIY has already failed twice.

How long until the infestation is completely gone?

Expect 3–8 weeks for most infestations with proper treatment. Insects with dormant life stages (pupae, eggs) extend the timeline because those stages are impervious to most insecticides. Follow-up treatments at 2 and 4 weeks catch each new cohort as they emerge.

What's the most common mistake people make treating this pest?

Treating only the visible pest population while ignoring the harborage site, entry point, or breeding location. Killing adults provides temporary relief but the population rebuilds from hidden egg cases, pupae, or new arrivals through unaddressed entry points.

🪰 Hover Fly / Drone Fly