Like grasshoppers, crickets are important most often on meadow streams, on freestone streams flowing through farm country, on any water where grass grows near the banks, and on rivers and streams thatflow through western country with mixed sagebrush and grass. Because this is common high-desert vegetation, the cricket can be a very common terrestrial you'll encounter if you fish western streams in midsummer through early autumn. The 'Mormon Cricket' is a typical cricket specie that one will encounter in Western states.
Importance:
Crickets will always arrive on waters by accident, never with the intention. Most often crickets will launch itself into the air during the warmth of the day, some feet back from the edge of the stream. It suddenly finds itself flying in a descending arce over water it likely didn't know was there. Because its body is so heavy in relation to the power of its wings, this bulky bits is not able to reverse its course, but lands on the water with a smack. Trout love when this happens and frequently look for opportunities to eat big terrestrials like a cricket.
Patterns:
Letort Cricket, Dave's Cricket, Henry's Fork Cricket, Black Madame X, and the Foam Cricket in black and tan size 10-14.