Notable hatches on the Neshannock April - May 5 Grannom, Size 16 & 14Tan Caddis, Size 16Dark Brown Caddis, Size 16 May 12 - June 10 Green Caddis, Size 16Sulpher Dun & Spinner, Size 16March Brown, Size 12Light Cahill, Size 14Brown Drake, Size 14Red Quill, Size 16Blue Winged Olive, Size 14Green Drake & Coffin, Size 10Slate Drake, Size 12 & 14 August 10 - August 30 Big Slate Drake, Size 8White May Fly, Size 14 & 16