Arthropod Class Insecta (Insects)

The caddis larvae in this picture built their cases from tiny pebbles.

In this picture: Insect Order Trichoptera (Caddisflies).

This underwater log hosts hundreds of caddisfly larvae, some in cases and some in spiderweb-like lairs.

In this picture: Insect Order Trichoptera (Caddisflies).

A peculiar mayfly nymph clings to a log. I'm not sure if it's a Heptageniid clinger or a flat-bodied Ephemerellid crawler, but I don't believe it's a species I've collected yet.

In this picture: Insect Order Ephemeroptera (Mayflies).

A small stonefly nymph crawls around some gravel.

In this picture: Insect Order Plecoptera (Stoneflies).

Two Ephemerella mayfly nymphs share a piece of wood with two Taeniopterygidae stonefly nymphs.

In this picture: Mayfly Genus Ephemerella (Hendricksons, Sulphurs, PMDs) and Stonefly Family Taeniopterygidae (Willowflies).

A water boatman flees the camera.

In this picture: True Bug Family Corixidae (Water Boatmen).

There are a couple Epeorus mayfly nymphs clinging to this rock. One interesting thing I've noticed is that even though the stream has a lot of clingers, they rarely show up in my photos, and I've started paying more attention to the river bottom while I'm fishing I've noticed that clinger nymphs generally see or feel me coming and scurry to the undersides of their rocks before I can get in picture range. I think I have the same problem with stoneflies.

In this picture: Mayfly Genus Epeorus (Little Maryatts).