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Your friend Fred sent you this picture from, a website about fly fishing for trout. It has thousands of close-up pictures of the bugs trout eat and information about how those bugs behave and how to catch choosy trout. There's more...

Fred wrote:
Hey Bob, have a look at this website. If I don't get out fishing soon my head's gonna pop.
Visit to see the details and full-size version of this picture.

There's a stonefly nymph in the bottom right corner of this picture, but what's really interesting is those white blotches. They're pretty common in my Wisconsin home river river, stuck flat onto the rocks--lots of rocks have a speckled look as a result. They are microcaddis cases, made by larvae of the caddisfly family Hydroptilidae. These are made by larvae of the subfamily Leucotrichiinae, most likely the genus Leucotrichia. They spin little flat oval cases of silk tight and immobile against the rocks.
This is an automated email sent manually by Fred through the "email to a friend" feature on If you've received this message in error, or somebody's abusing's email feature, forward this message to and describe your problem so it can be fixed. Thanks!