The basic pattern for fishing with Czech nymph is a fly, in Czech called Bobeš (read bobesh = Czech nymph). It is a weighted fly tied on a Gammarus hook. The Czech nymph imitates freshwater scuds, caseless caddis larvae, or is tied in absolutely fantastic colour combinations.

A true Czech nymph must be thin, to sink as near to the bottom as possible during its short trip through the water. Sizes of the flies differ according to fishing conditions (water depth, clarity, current speed, size of fish etc.). The most used sizes for European waters are #10 and #12. When nymph fishing on large rivers or expecting a strike of a large fish we often use flies up to the size #6. On small streams we can get down to nymph size #16.

Czech nymph is not the only type of a fly, we can successfully use for Czech nymphing. Also other types of artificial flies are effective, like jigs, nymphs with beads (gold, silver, brass), classical nymph types (pheasant tail, hare´s ear etc.) or nymph tied on special hooks (e.g. nymphs tied on hooks with a drop).

We can combine types, patterns, sizes and colours of the flies to our heart´s content and there is no guaranteed or best combination. When we know, what flies the fish are taking, we can fish with three identical patterns. In a situation, when we are not acquainted with the river or do not know the fish appetite, there is nothing left but to make some experiments and in such a case it gives us an advantage, when we tie on three different flies in different colours and sizes.