Why having a variety of flies for river fly fishing is important?
Matching the hatch: Fish in rivers feed on a variety of insects and other prey, and different insects hatch at different times of the year. Having a selection of flies that imitate these insects will increase your chances of success on the water.
Water conditions: The water conditions in a river can vary from day to day, affecting the behavior of the fish and the type of prey they're feeding on. Having a selection of flies that match these conditions can increase your chances of catching fish.
Fish preferences: Fish have individual preferences for different types of prey and may respond better to certain types of flies than others. Having a variety of flies to choose from allows you to experiment and find what works best on a given day.
Losing flies: It's not uncommon to lose a few flies while fishing, whether it's due to snags, break-offs, or fish taking the fly. Having a selection of flies ensures that you have backups and won't have to cut your fishing day short due to a lack of flies.
In summary, having a variety of flies for river fly fishing will help you match the hatch, adapt to changing water conditions, find what works best for the fish you're targeting, and ensure that you have enough flies to last throughout your fishing trip.