When it comes to fly fishing and what to use to catch trout, there are a few methods that can be applied. Firstly you will need to establish if the trout are feeding topwater or below the surface of the water you are fishing.
Topwater feeding trout will usually go for a dry fly that sits and floats on the top of the water or a buzzer that sits just below the surface of the water. Trout-feeding topwater prefers to catch their prey as close to the surface as possible and will usually consist of small insects and dragon flys.
Below surface feeding trout will usually like to take a nymph or a weighted fly that has been tied onto a leader connected to a sinking line. The sinking line will allow the fly to get down quickly to the level the trout is feeding at and thus result in a better strike and hook up rate.
If you are topwater fly fishing with a dry fly, then patience is key here. You will start out by casting the fly to where you have seen the trout like rainbow trout rising to the surface to feed. Allowing the fly to land on the surface of the water here as quietly as possible and without causing a splash here is key so as not to spook the fish.
Once the fly has landed on the surface, you will allow the fly to float around naturally, and once every 30 seconds to 1 minute give the line a little twitch to jerk the fly a little and make it appear as though it is a real live fly moving on the surface of the water.
You can see an example here in this video of dry fly, fly fishing:
Fly fishing below the surface such as with a weighted fly requires the opposite approach as outlined above. You will take a weighted fly such as a nymph with gold weight eyes as shown in this picture:
and proceed to cast again to where you have seen fish either rising or swirls around the top of the water. Once the fly has hit the water, again taking care not to slap the water with the fly and spook the fish and allow the fly to start to sink. As the fly has sunk 10-20 inches below the surface, you can slowly retrieve the fly line with small pulls of the line back towards you.
This short pulling on the line will make the nymph move slowly through the water again like a small insect swimming or baitfish. This video will give you an example of how it works:
There are many methods used to catch trout but the above methods are 2 of the ways I catch rainbow or brown trout when out fly fishing. I hope you found the articles useful with some simple tips in text and video that will allow you to target trout with some easy-to-apply methods.
Trout fishing can be extremely fun and they are really great to catch on a fly rod. I have caught many trout over the years fly fishing and all in varying sizes. The methods above work really well for both small and large trout and can be applied in all seasons of the year.
Do go and try them out for yourself as practice makes perfect and improves your chances of catching a trout.