What Fish Eat

Aquatic insects make up the majority of a fish's diet. The four key insect orders (listed first and not including Streamers or Terrestrials) that emerge from streams and lakes are:



A streamer is a wet fly pattern which imitates a small baitfish that larger trout will feed on. There are a number of streamer patterns which can be effective in trout habitat - lakes and streams. Listed in the table below are just a couple of patterns that I've found to catch trout in the Sierra Nevada.

Streamer Patterns

Pattern Name Color Hook Size Thumbnail Image
Matuka Black Body # 10
Wooly Bugger Olive Green Body # 16
Wooly Bugger
Zonker Green Body # 8

Photo of October Caddisfly by P. Michael Carl © The Ecological Angler