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I found a fly (I assume its a fly) in my garden yesterday and I'm wondering what it is. It is about 3-4 mm long and it looks like it has pieces of white cotton all over its body and face (the pieces of cotton seem to be missing here and there). Its wings are transparent and its antenna are about half the length of its body.
Does anyone know what this can be? I can post a picture if needed.
Thanx in advance!

Gea