The typical cluster fly Pollenia rudis is about 7 mm long, has short golden-coloured hairs on the thorax and irregular light and dark grey areas on the abdomen. Cluster flies are typically slow moving and pass the winter as adults so are very common in early spring.
There are over 20 Pollenia species recorded in Britain, most of which can't be identified without microscopic examination to key out complex features. Pollenia rudis is generally the most common species.
In autumn, it can be commonly found sunning on sheltered fences and tree trunks.
All year round.
Cluster flies are so called because they congregate, often in large numbers, to hibernate in attics and out-houses. Its larvae parasitise earthworms.
Widespread and common in Britain.
Common in Leicestershire and Rutland
Leicestershire & Rutland Map
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