- The insect hatches at Bewl are variable from year to year due to the changing water levels.
- The most predominate emerging insects are the midges (chironomids) which is the primary diet of the trout.
- Shallow areas of Bewl will hold sedges, damsel flies and some buzzers
- There is a plentiful hatch of large black buzzers from the middle of March right through to the end of April when they stop hatching.
- Smaller brown and olive buzzers start to appear in late April and May
- Hawthorn flies (terrestrials) tend to appear at the end of April.
- The deep-water species of midges provide food for the trout during the summer. These tend to be quite small.
- From June to October there is a light but continuous presence of large dark midges.
- June is a good time for sedge but their abundance is dependent on high water levels as they need this to thrive.
- During mid June to October corixa, damsels and shrimp become an important food source if plentiful.
- The existence and quantity of daphnia vary because they feed on algae, which in turn is dependent on the condition of the water. A good fly to try if fish are feeding on daphnia is the blob.
- From mid summer to the end of the season coarse fish fry become the main food source. Fry tend to favour deep-water bays and along the banks where there is enough deep water to shelter them. This is a time when larger trout can be caught from the bank as they come in close to feed on the fry.
- The Crane fly better known as Daddy-long-legs is a good source of food for trout and always worth using in its many fly dressings.
After spooning it is evident that this trout has been feeding on daphnia
Trout that are feeding on daphnia can be difficult to catch. A good fly to try in this situation is the blob. The trout above was caught on a yellow and orange blob.