Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Terrestrial crickets are not found in trout streams nearly as often as grasshoppers, but fly shops still sell imitations and trout still take them eagerly.
Start a Discussion of Gryllidae
References
Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.