Small Normandy chalk stream with quiet character and consistent flow. Wild brown trout and grayling respond to seasonal insect patterns. Clear water, stable temperature typical of chalk geology. Small flies required: olives and ephemeralids (16–18), sedges (14–16) in evening. Presentation matters more than fly choice. Some stretches private. Check access with local club.
In chalk-spring and karst trout systems, generally stable temperatures broaden olive and other mayfly activity from early spring into autumn, with strong evening caddis, steady subsurface scuds and buzzers where clear groundwater and weedbeds develop, and terrestrials from meadow and woodland banks rounding out the food calendar, depending on how fast each river drops and clears after rain.
- Chalk