Here is a nymph that I use in this period of time. Trout love it especially in the first part of the day:
The body is made using cream-light brown dubbing mixed with cdc. In this way the body is more translucent then the body made of regular dubbing.
I use this variant when the water temperature is warmer and the emergers start to appear everywhere.
Materials that I use:
Hooks: ST300 BL #12
Thread: Textreme Standard 8/0 white
Tail: red floss
Ribbing: UV white Peter’s Ribbing Quill