Insect infestation returning every year to my home

Asked April 13, 2018, 5:39 PM EDT

Every year for the past several years these small flies appear in the window seals, invading our home. We have spent hundreds of dollars and no one can help us or identify them. Based on my own research it appears to be in the phoridae fly family. Can you please confirm or identify and provide resources to eliminate this infestation we face yearly. Each year they arrive earlier, and we have tried everything. Thank you

Montgomery County Maryland pest control cluster flies flies return every year

2 Responses

These may well be cluster flies, which are attracted to windows (the light, actually) and will often recur year after year. Here is our webpage about them: https://extension.umd.edu/hgic/cluster-flies

They are a nuisance, not a health hazard. Tighten up whereever you can.

This fact sheet may be helpful for comparison and other options: https://extension.umd.edu/sites/extension.umd.edu/files/_images/programs/hgic/Publications/not_updat...
Here are photos since we can't see yours well enough in the photos to make a positive id: https://extension.umd.edu/hgic/flies

ECN

These may well be cluster flies, which are attracted to windows (the light, actually) and will often recur year after year. Here is our webpage about them: https://extension.umd.edu/hgic/cluster-flies

They are a nuisance, not a health hazard. Tighten up whereever you can.

This fact sheet may be helpful for comparison and other options: https://extension.umd.edu/sites/extension.umd.edu/files/_images/programs/hgic/Publications/not_updat...
Here are photos since we can't see yours well enough in the photos to make a positive id: https://extension.umd.edu/hgic/flies

ECN