Czech Nymphing Techniques or High Sticking. This uses heavy Czech Nymphs fished close in fast water. Czech Nymph Flies - all czech nymphs use a heavily-leaded hooks. 'Matching the hatch' is not a priority, this is an active searching method and as such, technique is more important than the czech nymph flies pattern.
Czech nymph flies have many, many variations, but all czech nymphs have a heavily-leaded hook. Czech Nymph Flies are intended to be fished very deep, in fast water, weight & a slim profile are important. However the key is to use heavily-weighted flies, so beadhead nymphs, tungsten flies and caddis nymphs will do just as well. 'Matching the hatch' with czech nymphs is not a priority with this fishing! This is an active searching method and, as such, technique is more important than specific pattern.