There should be enough surface activity to allow for a little dry fly action. Tricos, Caddis, Iso, Cahill and Sulphurs for sure. What you see and how heavy the hatch will be is determined by what section of the river you are on. Here's the current hatch report from the DRC...
Isonychia bicolor –Iso/Slate Drake #12-2XL
Ephemerella dorothea –Sulphur- #16/18/20
Stenonema sp. - Light Cahill #12-#14
Ephemerella deficiens- Blue Wing Olive #14
Hydropsyche sp. –Tan Caddis –#16-#18
Emphemerella invaria - Light Cahill –#12
Brachycentrus sp. (Dark Grannom –Charcoal) #16- #18
Pseudocloeon - Little BWO’s- #22-#26
By delawareriverclub,on July 31st,2011
The low humidity and bright sun burned off much of the fog and mist that has been a problem the last few nights,giving way to an fantastic evening of fishing throughout the length of the West Branch. Sulphurs,olives,even a few isos have made a reappearance. During the late morning and into the afternoon,check the riffs for fish slashing at the emerging Hydropsyche caddis (tan #14 ) –they aren’t being picky!
By delawareriverclub,on July 28th,2011
We’re not sure what happened to these fish,but man are they hungry! Everyone out had a fantastic day on the river,catching fish on caddis early on,and sulphurs and olives into the evening. Fish were holding in SHALLOW riffles,almost as if they wanted to be in the sun! A #14 or #16 tan caddis (almost any pattern) was the trick for drumming them up in those riffles,and a good mix of rainbows and browns were there to be had! The ‘bows kept breaking a few of our guests off with their acrobatics –just what a purveyor of flies likes to hear!
