Facilities, Infrastructure and Risk Management (FIRM)
Facilities Management Services
TO: Shutdown Group, Facility Coordinators
FROM: Service Response Center
SUBJECT: Increased Presence of Cluster Flies on Campus
FMS has received numerous reports of cluster flies in campus buildings and would like to provide information about this common seasonal occurrence.
Cluster flies are a seasonal nuisance pest that commonly seek shelter indoors during the fall and early winter months as temperatures drop. While they can appear in large numbers and be an annoyance, they do not bite, sting, damage buildings, or pose a health risk.
You may notice cluster flies gathering around windows, light fixtures, or other warm, sunny areas inside buildings. This is a temporary seasonal occurrence that can happen even in well-maintained facilities. As outdoor temperatures continue to decline, cluster fly activity is expected to decrease.
FMS is monitoring reports and working with our pest management provider to address areas of concern where practical. Because these insects often enter buildings through small cracks and openings before becoming active indoors, complete elimination during peak migration periods can be challenging.
If you encounter an unusual concentration of cluster flies in your area, please contact Jonas MacDonald, FMS Engineering Services Specialist, at jonasm@andrew.cmu.edu or 724-272-3153.
We appreciate your patience and understanding as we work to manage this seasonal issue.
Cluster flies are a seasonal nuisance pest that commonly seek shelter indoors during the fall and early winter months as temperatures drop. While they can appear in large numbers and be an annoyance, they do not bite, sting, damage buildings, or pose a health risk.
You may notice cluster flies gathering around windows, light fixtures, or other warm, sunny areas inside buildings. This is a temporary seasonal occurrence that can happen even in well-maintained facilities. As outdoor temperatures continue to decline, cluster fly activity is expected to decrease.
FMS is monitoring reports and working with our pest management provider to address areas of concern where practical. Because these insects often enter buildings through small cracks and openings before becoming active indoors, complete elimination during peak migration periods can be challenging.
If you encounter an unusual concentration of cluster flies in your area, please contact Jonas MacDonald, FMS Engineering Services Specialist, at jonasm@andrew.cmu.edu or 724-272-3153.
We appreciate your patience and understanding as we work to manage this seasonal issue.