Local fly information

Fly control in Maryland

Learn what to look for around your property, explore your city, and ask about an inspection or a quote.

Flies in Maryland: what to know

Around Maryland

Conditions vary across the state. Choose your city below, then describe what’s happening around your home or business.

What to note

Where you see flies, how long it has been going on, and anything you’ve already tried are the most useful details to mention.

A useful next step

Ask about an inspection, what treatment would involve, and whether follow-up visits are included. You don’t need to identify the problem yourself before getting in touch.

Local research

Flies in Maryland: what the public record shows

Before you compare quotes, it helps to know which flies actually live in Maryland, when they are busiest, and what the state figures look like. Everything below links to the agency or university page it came from.

3/8 inch long, dark gray and non-metallic; adults usually enter homes in late August to overwinter in attics and wall voids warmed by winter sun, most often on southern exposures

Cluster fly size and entry timing in Maryland

The south-facing attic is where Maryland cluster flies concentrate, which tells you where to seal and where to look.

University of Maryland Extension Home & Garden Information Center

Adults about 1/4 inch, dull gray; mature maggots 1/4 to 3/8 inch, whitish, eyeless and legless

House fly size in Maryland homes

Finding maggots that size indoors means the breeding medium is inside or immediately outside the house.

University of Maryland Extension Home & Garden Information Center

2 to 4 weeks; large numbers indoors usually mean breeding in the home or immediately around it, such as a dead mouse in the attic or a dead bird in the chimney

Blow fly and bottle fly life cycle

Maryland Extension treats an indoor bottle fly cluster as a carcass search, not a spraying job.

University of Maryland Extension Home & Garden Information Center

Fly species recorded in Maryland

House fly (Musca domestica) — Non-biting; breeds in manure, garbage, lawn clippings, decaying produce. 45 days at 60°F to 7 days at 95°F. Carries bacteria and viruses causing diarrhea, cholera, food poisonin…
Stable fly (Stomoxys calcitrans) — Biting fly with bayonet-like proboscis; about 12 days egg to adult; peaks early summer.

When flies are busiest in Maryland

Cluster flies enter in late August and reappear on warm winter and spring days; house fly and blow fly activity peaks through the warm months.

University of Maryland Extension: insecticide spraying is generally not effective or recommended inside the home; find and remove the larval site, then trap adults with baited traps or sticky tape.

For context, nationally

About 45 days at 60°F; 7 days at 95°F — House fly life cycle vs temperature. Texas A&M AgriLife Extension
75–150 per cluster; 350 to 900 in a lifetime — House fly eggs per female. University of New Hampshire Extension

Sources: University of Maryland Extension Home & Garden Information Center; Texas A&M AgriLife Extension; University of New Hampshire Extension; Flies (Home and Landscape). Figures are quoted as the source prints them. How we check our sources

Explore Maryland cities

Annapolis

Humid Subtropical · urban setting

Fly control in Maryland

Flies in Maryland: what to know

Around Maryland

What to note

A useful next step

Flies in Maryland: what the public record shows

Fly species recorded in Maryland

When flies are busiest in Maryland

For context, nationally

Explore Maryland cities

Annapolis

Baltimore

Bethesda

Bowie

Catonsville

Columbia

Frederick

Gaithersburg

Germantown

Glen Burnie

Hagerstown

Laurel

Rockville

Salisbury

Silver Spring

Waldorf

Towson

Ask about fly control in Maryland