This is almost certainly due to the relatively low river conditions during their growth period without the loss normally associated with the numerous winter spates that the Wye has encountered in previous years.
The Parr were certainly difficult to avoid when fishing but a change from a nymph to a 'Elk Hair Caddis' dry fly attracted a number of Grayling, nothing huge but plenty of fun all the same.
Earlier on in the day I undertook a little 'Kick Sampling' of the rivers - Irfon, Wye & Edw with mixed results.
The entomology of the local rivers is something that I have recently become more interested in and at the moment I am definitely at the 'learner' stage but understanding what crawls under your feet while fishing can be very informative to your fly choice.
My initial findings show the Edw and Wye to be in pretty good health as far as invertebrate life but the Irfon I feel is certainly lacking in a few of the common species with no Freshwater Shrimps (Gammarus) found at all.
I will endeavour to maintain a regular sampling of these rivers in the future.