Underwater Pictures, Page 9

Late May finds many trout streams brimming with tiny minnow fry in large schools.

Several fast-swimming Siphlonurus nymphs blend in very well with the silt in this slow backwater along a trout stream.

In this picture: Mayfly Genus Siphlonurus (Gray Drakes).

There's a brook trout running with this school of creek chubs and common shiners at the head of a crystal clear spring.

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 is a pretty clear photo of an Epeorus nymph clinging flat against a log. The big mound of debris on the bottom center of the picture, attached to the light rock, is a structure that's been puzzling me. I've found several in one section of the river. It's big, like 2 inches long and maybe 1/2-3/4 inch wide/tall, and hollow, like some sort of coccoon or something. It's clearly a structure built by some sort of little creature, but I'm not sure what.

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

The strange tubes all over this rock house tiny midge larvae.

In this picture: True Fly Family Chironomidae (Midges), Insect Order Ephemeroptera (Mayflies), and Insect Order Trichoptera (Caddisflies).