I know what you mean about trying to find an interesting subject to photograph at this time of the year. I haven't taken a new shot for what feels like ages. I just can't seem to find the time, plus it is usually dark when I get home from work.
I must admit I wasn't positive as to what I was suppose to be looking at, so I googled (Trichoptera case) and found a whole new world of strange insect behavior. I will have to keep my eyes open the next time I visit a body of water. Thanks for sharing this unique and interesting image.