Naturally your house is warmer.
Attic flies uk.
Unlike more familiar blow flies such as the bluebottle genus phormia they do not present a health hazard because they do not lay eggs in human food.
You may see a large group of cluster flies around a window as they are attracted to the light on sunny winter days.
Cluster flies habits mean that they are no real risk to human health like most common flies but they are a nuisance.
Cluster fly from wikipedia the free encyclopedia the grass flies or cluster flies or attic flies are the genus pollenia in the family polleniidae are completely harmless to human health.
Cluster flies facts identification control latin name.
They are greyish olive in colour and adorned with golden hairs which makes them quite distinctive to the trained eye.
They require warm places to hibernate over winter.
Flies that gather in roofs around windows and on walls inside in the autumn and winter are called cluster flies also known as attic flies.
Cluster flies then re emerge around late winter spring time when they can become a problem again.
Light and dark gray checkered abdomens.
Attic flies which are also known as cluster flies are insects that often migrate into homes in the fall where they hibernate for the cooler fall and winter months.
Cluster flies are commonly found in quiet undisturbed parts of your home such as attics and wall voids.
Appearance what do they look like.
The anomaly is that cluster flies may try to get into one house but may stay clear of a neighbouring house even if it is a pair of semi detached properties.
They are strictly parasitic on earthworms.
Cluster flies also known as attic flies are household pests.
Most commonly they move from the ground to your attic for the winter when it gets cold.
Thus the common name they have of attic flies.
Cluster or attic flies are the genus pollenia in the blowfly family calliphoridae.
Adults measure 8 to 10 millimeters.
Cluster flies belong to a family of flies called pollenia and are medium sized about 10mm in length.
They are known to give off a sickly odour and they also have a big effect on earthworms around your home.
Cluster fly image licensed under cc.
By instinct they seek shelter away from the elements such as in the fall when it gets cold.
And the easiest entrance is usually through external gaps leading to your attic.
The females lay their eggs near earthworm burrows and the larvae then feed on the worms.
The thorax of an adult cluster fly is covered in short golden hairs and the wings overlap when at rest.
Cluster flies are often known also as attic flies.
