Fever Fly Headshot

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The fever fly is related to the St Mark’s fly which also appears in spring and is similar in appearance in many ways but the fever fly is some what smaller being only about 10mm long. The fever fly is certainly most common in late April and throughout May but they can be seen after that well in to August and beyond. Early in their season they are often seen in swarms in woodlands and along hedgerows and this is a good indicator of the species.

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