Salmonidae
European grayling
Thymallus thymallus · 25–45 cm on good rivers; anything over 50 cm is exceptional.
How it feeds
Grayling are bottom-oriented shoal feeders with a small, underslung mouth, taking cased caddis larvae, shrimps and small nymphs. They rise readily, and because their mouth is small they are far more tolerant of a slightly dragging dry fly than trout are.
How to fish for it
The clue is the shoal: catch one and there are usually five more in the same run. Work a run thoroughly with a tight-line nymph rig before moving on, and use a short line because grayling hold tight to the bottom in the slowest part of the current.
Flies that work: Czech Nymph · Pink Shrimp · Klinkhamer · Grayling Bug · Waterhen Bloa
European grayling in the ledger
River Test
Hampshire, England, United KingdomThe birthplace of dry-fly fishing, and still the hardest place to fool a brown trout.
brown · grayling · rainbow
Apr · May · Jun · SepRiver Wharfe
Yorkshire Dales, England, United KingdomA dales river where the grayling season covers the winter and the trout season does not.
grayling · brown
Jan · Feb · Jun · Oct · Nov · DecSoča River
Julian Alps, SloveniaThe only river in the world with a native marble trout, in water that looks photoshopped.
marble trout · grayling · rainbow · brown
May · Jun · Jul · SepTraun River
Upper Austria / Salzkammergut, AustriaChalk-stream clarity with alpine gradient, and some of Europe's largest grayling.
brown · grayling · rainbow
May · Jun · Sep · Oct · Nov