Western Montana Hatch Chart

January February March April May June July August September October November December Caddis Grannom Sizes 12-18, Brown to Light Green Spotted Sedge Sizes 12-16, Brown to Tan Brown Sedge Sizes 14-18, Brown October Caddis Sizes 6 & 8, Burnt Orange January February March April May June July August September October November December Mayfly Baetis Sizes 14-22, Blue Winged Olives March Brown Sizes 12-14, Brown Ameletus Sizes 14-16, Red/Gray to Gray Pale Morning Dun Dull Yellow Red Quill Sizes 10 -12, Rust to Red Green Drake Sizes 8-12, Green Gray Drake Sizes 10 -14, Gray Mahogany Dun Sizes 12-16, Burgundy Trico Size 18, very tiny January February March April May June July August September October November December Stonefly Capnia Sizes 16 & 18, Black Nemoura Sizes 12 & 14, Brown Skwala Sizes 10 & 12, Greens to Browns Large Golden Stone Sizes 6 & 8 Small Yellows Sizes 14-18 Salmon Fly Sizes 4 & 6 January February March April May June July August September October November November Midges Small Black Midge Just about the entire year Small Green Midge Just about the entire year