These caddisflies were thick over the water in the evening on a cold, clear northwoods lake.  They were in many places on the lake, all closer to the shady shore, which also was the shore most sheltered from the wind.  I'm not sure which of those features attracted them. From Lake Owen in Wisconsin.
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These caddisflies were thick over the water in the evening on a cold, clear northwoods lake. They were in many places on the lake, all closer to the shady shore, which also was the shore most sheltered from the wind. I'm not sure which of those features attracted them.

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