Mayflies
Stoneflies
Caddisflies
Gammarids
The Reverotte is the Dessoubre's principal tributary and, depending on who you talk to, either the best-kept secret of the Doubs or just a smaller Dessoubre. It's both, really. Short — under thirty kilometres — it runs through the same limestone plateau and feeds the same big grayling down in the Dessoubre's lower reaches. Walking up it feels like being let into a private beat: narrow in places, pocket water in others, the occasional deep glide where you can cover three fish with the same cast if you're clumsy. The trout are mostly small and the grayling are mostly not, which is a pleasant inversion of how these things usually go. It's the kind of river you show up on with a single fly box and no particular plan, and leave with an evening's worth of stories you'll tell badly at the bar.
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.
- Limestone