Wandering nymphs in the middle of the water column can be extremely challenging to call in. Trout frequently feed in the middle of the column as pests hatch instead of deep along the bottom. Even when there are pests hatching, fish will feed simply listed below the surface area on nymphs and emergers. Dave Jensen describes how to fish a nymph mid-depth and why this is a very important and beneficial ability for any trout angler to have in thier toolbox.
Have a look at the following knowing centers for additional information on training fly fishing.
https://howtoflyfish.orvis.com/
http://www.orvis.com/guide-to-fly-fishing
