Tied according description of old fly tier from Jura canton in Switzerland and used with great success on legendary river Doubs
Serratela nymphs are classified as “sprawlers” by the entomologists, but “moss creeper” or “super crawlers” seems more apt. The main features of the Serratela nymph are: three short tails; stocky thorax; wide abdomen, stout- strong legs and very prominent elliptical head, the gills are smallish and plate like. The colors depend upon its immediate environment with predominance of brown, yellowish and black, though those who live in water weeds can be olive or dark green and those living in light colored chalk streams and gravels can be pale.
This BWO nymph pattern with ostrich herl gills could imitate more naturals, BWO natural with its pale gills and dark body and thorax is one of the matching nymph imitations.
Used materials in order of tying:
Hook: 16-18 Nymph ( Tiemco 113 BLH)
Thread: black 12/0
Weight: lead wire 0,6mm
Tail: black hackle fibers
Gills: white ostrich herl
Back cover: black Swiss straw (raffia)
Ribs: copper wire 0,10 mm
Thorax: peacock ice dubbing
