About Cluster Fly
A medium-sized, dark gray fly with golden-brown hairs on the thorax. In autumn, it gathers in large clusters inside buildings to hibernate, sometimes in the thousands.
Did You Know?
The larvae of this fly are earthworm parasites, burrowing into the worm through its skin and consuming it alive from the inside over several weeks.
How to Identify Cluster Fly
Cluster Fly (Pollenia rudis) belongs to the order Diptera, family Calliphoridae. Adults typically measure 8-10 mm.
Cluster Fly Habitat
Cluster Fly is found in gardens habitats, particularly across Europe, North America. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Cluster Fly Diet and Feeding
Cluster Fly is a parasitic species that feeds on or within a host organism. Parasitic insects have evolved specialised adaptations to exploit their hosts while avoiding detection.
Where Is Cluster Fly Found?
Cluster Fly can be found in Europe, North America, where it inhabits gardens environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Cluster Fly can be found
Is Cluster Fly Dangerous?
Cluster Fly is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Cluster Fly Role in Nature
Cluster Fly plays a role in its ecosystem as part of the food web, serving as both consumer and prey. Insects like Cluster Fly are a vital food source for birds, bats, and other wildlife, and contribute to the overall health and balance of their environment.
Seasonal Activity
Frequently Asked Questions About Cluster Fly
What does Cluster Fly look like?
The Cluster Fly typically measures 8-10 mm.
Where is Cluster Fly found?
The Cluster Fly is found in Europe, North America and typically inhabits gardens environments.
What does Cluster Fly eat?
The Cluster Fly is a parasite that feeds on a host organism.
Is Cluster Fly dangerous to humans?
The Cluster Fly is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Cluster Fly?
The larvae of this fly are earthworm parasites, burrowing into the worm through its skin and consuming it alive from the inside over several weeks.
Cite This Page
APA:
InsectDiscover. (2026). Cluster Fly (Pollenia rudis). Retrieved from https://insectdiscover.com/insect/cluster-fly
MLA:
"Cluster Fly." InsectDiscover, https://insectdiscover.com/insect/cluster-fly.