Versatile Fly Patterns
Sometimes you get in a situation where you just don't have the right bug. However, there are some versatile patterns that might be close enough. Here are a few of my favorites:
JRS Nymphs - This pattern can imitate both stonefly and mayfly nymphs and is a great attractor.
Parachute Adams - No surprise here. This fly is THE versatile dry fly. Works for almost all mayflies and midges.
Clouser Minnows - This is the do-it-all streamer. Works in fresh and salt water for almost every fish species, and with the several color options, it imitates a huge range of baitfish.
Try these in a similar size and color options as your local bugs the next time you're in a pinch.