Cluster Fly
(Pollenia species)

Size: ⅜ inch
Characteristics: Dark gray with golden hairs
Legs: 6

Habitat:
Cluster flies live outdoors but enter homes to overwinter. Often found in attics, wall voids, and upper floors. Common in fall and winter.

Threats & Dangers:
Do not reproduce indoors but gather in large numbers. Presence causes odor and staining. Major nuisance during cold months.

Control Measures:
Exclusion and sealing entry points are key. Professional attic and wall treatments reduce populations. Preventive exterior treatments help.