Underwater Pictures from Trout Streams, Page 6

Hundreds of cased caddis larvae cling to sparse weed growth in the sand under heavy current.

In this picture: Insect Order Trichoptera (Caddisflies).

A variety of cased caddisfly larvae, probably mostly Neophylax, have clustered along the backside of a rock in fast water. There seem to be some Helicopsychidae larvae clustered along the bottom, and a few other taxa are mixed in. It's interesting that several larvae have especially large stones placed over the front openings of their cases, perhaps to block the case off for pupation.

It does seem to be the wrong time of year for Neophylax to be pupating, but that was the ID given for one of these which I collected and photographed up close.

In this picture: Caddisfly Genus Neophylax (Autumn Mottled Sedges) and Caddisfly Genus Helicopsyche (Speckled Peters).

Light beams filter through a wavy surface.

Here's the stream bottom of a newly renovated artificial channel created by the Wisconsin DNR to restore the natural flow of a small stream that had previously been diverted through a series of shallow, water-warming old private hatchery ponds.

This picture has a lot of common shiners in the mix with the school of small brook trout.