6906.    I have a lot of theses flies that lay egg masses (I assume they are eggs) as seen to the left of the bug. The fly is about one inch long. They usually lay the eggs on corners and only on the boathouse, not the cottage. I have to scrub the masses to get them off. They come every year. I’m located in the Kawartha Lakes region of Ontario. COBOURG, ONTARIO. Canada

Number 6906. This looks like an alderfly (Neuroptera: Sialidae). They usually lay their eggs in situations where their newly hatched larvae can drop into water. Their larvae are predators on other small aquatic life forms, and are an important part of the freshwater food web. Click here for additional information.

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