Currently viewing the category: "Bathroom Flies"
What's That Bug? does not endorse extermination

Subject:  Flys
Geographic location of the bug:  Malibu California up in the hills
Date: 07/23/2018
Time: 02:37 PM EDT
Your letter to the bugman:  I keep finding this little fly only in one bathroom of my bathrooms not any other room. It’s been recently remodeled.
They are not fast and all black
How you want your letter signed:  Debby V.

Drain Fly

Dear Debby,
This is a Drain Fly or Bathroom Fly, a common household nuisance.  The larvae breed in the sludge found in your drains.

What's That Bug? does not endorse extermination

Subject: Flying insect
Location: Nappanee Indiana
February 1, 2017 7:17 pm
I’m trying to identify a small winged insect about the size of a pencil eraser.
Signature: Dacia Reid

Bathroom Fly

Dear Dacia,
Based on this BugGuide image, we are confident this is a Moth Fly in the subfamily Psychodinae, the group that contains a common household pests known as Bathroom Flies which according to BugGuide are “often found around sewage installations, in public washrooms, and bathrooms in homes, and are attracted to light; larvae live in organic sludge that forms on inner surfaces of drains and sewage pipes; pupae occur on the surface of the organic film that the larvae have been living in.”

What's That Bug? does not endorse extermination

Subject: Bug in south florida
Location: South florida
May 27, 2016 4:14 pm
I just need to know what big this is. Every once in a while I see these in my bathroom. I live in south Florida
Signature: Rick

Bathroom Fly

Bathroom Fly

Dear Rick,
The Bathroom Fly or Drain Fly gets its common name because the larvae develop in the sludge that forms in plumbing.  Your submission will go live in June while the editorial staff of What’s That Bug? is away from the office.

What's That Bug? does not endorse extermination

Subject: Insect identification
Location: Iasi, Romania
April 5, 2016 1:50 am
Hi,
please help me identify this insect. It’s been in my bathroom since quite a few years, and lately in my kitchen too. I live in a block of apartments. It’s about everywhere, and doesn’t fly very well or for a long time. It’s small, about 3-4 mm long/wide.
Thank you very much!
Signature: Alex

Bathroom Fly

Bathroom Fly

Dear Alex,
The Bathroom Fly or Drain Fly is a common household pest that breeds in the sludge that accumulates in household plumbing.

Dear Daniel,
thank you very much! Now I can look forward to removing this pest.
I really appreciate your input!
All the best,
Alex

What's That Bug? does not endorse extermination

Subject: Tiny weird moth
Location: Abu Dhabi United Arab Emirates
March 17, 2015 6:50 am
These little moths are all over my house and stick to the walls. They are about a half cm wide and a half cm tall. I just have no idea what they feed on or how to get rid of them. Please let me know! Thanks!
I live in Abu Dhabi… Very hot weather.
Signature: Busjam

Bathroom Fly

Bathroom Fly

Dear Busjam,
This Bathroom Fly or Moth Fly is a common cosmopolitan household pest.  They are generally found in bathrooms as the larvae live in the sludge that accumulates in plumbing pipes.

What's That Bug? does not endorse extermination

Subject: Whats this little bug?
Location: 95762 CA, US
January 13, 2014 11:06 pm
Mid January in Northern California near Sacramento. These little bugs have been bugging my plants in an aquaponics system in a hoop house. They also seem to leave webs of some kind behind. Any help would be greatly appreciated! thanks
Signature: Chris Haislet

Drain Fly

Drain Fly

Hi Chris,
This appears to be a Drain Fly or Bathroom Fly in the genus
Clogmia in the Moth Fly family Psychodinae.  We typically get identification requests regarding Drain Flies from homemakers who are perplexed by their appearance in bathrooms and kitchens.  In the home, the larvae live in the sludge that collects in drains and pipes.  According to BugGuide:  “Larvae feed on algae, fungi and bacteria in sewage and organic sludge; adults feed in polluted water and on flower nectar.”  We don’t believe they have any interest in your plants, but rather in the hydroponic system itself which may need some cleaning and maintenance.  We are not convinced the webs you mentioned are related to the Drain Flies.  BugGuide also notes:  “In the home, females lay irregular masses of 30-200 eggs in the organic gelatinous film lining drains, particularly in bathtubs and showers; eggs hatch 32-48 hours after being laid, when ambient temperatures are 70ºF (about 20ºC), and larvae pupate 9-15 days later; pupa stage lasts 20-40 hours; development time from egg to adult is 7-28 days, depending on temperature and food availability; adults live for about two weeks” and “Larvae play an important role in purifying sewage in industrial sewage treatment plants. Adults are very weak fliers, covering only a few feet at a time in short erratic flights.”

What's That Bug? does not endorse extermination