Troutnut.com User Gladeriaen

Hundreds of cased caddisfly larvae live on this log in a small brook trout stream.

In this picture: Insect Order Trichoptera (Caddisflies).

This picture from below shows a stillborn (

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This stillborn Ephemerella subvaria dun is trapped in its shuck.

Stillborn: In fly fishing, a stillborn insect is one which got stuck in its nymphal or pupal shuck during emergence and floats helplessly on the surface instead of flying away. It is a specific class of cripple, although it is sometimes used interchangeably with that term.) Ephemerella subvaria (Hendrickson) dun drifting on the surface amidst a number of shed pupal skins from Brachycentrus caddisflies which were heavily hatching that day.

In this picture: Mayfly Species Ephemerella subvaria (Hendrickson) and Caddisfly Species Brachycentrus appalachia (Apple Caddis).

This picture came out poorly, but it still shows pretty well just what effective tools those rear prolegs are for caddis larvae to grip the rocks. It can be surprisingly hard to pick them up when they're grabbing onto something.

Rhyacophila fuscula (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York