February & March Insect Emergence Date Recommended Patterns Tiny Winter Black Stone February Late Morning - Mid Afternoon 18-22 Lawson's Little Black Stone Tied sparse in dark colors Blue Winged Olive Baetis February - March Early Afternoons - Warm Days 18 Blue Winged Extended Body Olive 18 Adams 16-18 Pheasant Tail Nymph Early Black Stone February - March All Day 18 Black Stone Fly Nymph 18 Black Adult Stone Fly 18 Mike Lawson Black Stone Blue Quill Paraleptophlebia Adoptiva Late March Morning to Early Afternoon 18 Blue Quill Wet & Dry 18 Adams Quill Gordon Epeorus Pleuralis Late March Early Afternoon 12 - 14 Quill Gordon, Wet & Dry Dun Caddis February Late Morning - Late Evening 18 Henryville (Dark Dunn or Black) 18 Elk Hair Caddis 16-18 Dark Dunn or Black Pupa Midge February 18-22 Griffith's Gnat 18-22 Adams Egg Patterns February - March 10-18 Variety of Patterns April Insect Emergence Date Recommended Patterns Giant Black Stone April 4-8 Black Stone Nymph Hendrickson Ephemerella Subvaria April Female Spinner has Yellow Egg Sac 14 Hendrickson, 14 Red Quill, 14 Female Adams Blue Quills Paraleptophlebia Adoptiva Early April Mornings to Early Afternoons 18 Blue Quill Wet & Dry 18 Adams Quill Gordon Epeorus Pleuralis Early April Early Afternoons 12 - 14 Quill Gordon, Wet & Dry Early Brown Stone Early to Mid April 12-14 Little Brown Stone 10-12 Early Brown Stone Fly Nymph Dark Dun/Black Caddis Mid-April Mid-Mornings 14 - 16 Black Soft Hackle 14 - 16 Dark Elk Hair Caddis Mottled Brown/Gray Caddis Mid-April All Day 16 Brown or Gray Soft Hackle 16 Brown Elk Hair Caddis March Brown Stenonema Vicarium Mid-April Sporadic All Day 12 March Brown, Wet & Dry Green Drake Late April (limited) Late Morning - Late Afternoon 8-10 Green Drake 8-10 Green Drake Nymph (jointed body) 8-10 Green Drake Spinner (Coffin Fly) May Insect Emergence Date Recommended Patterns Mottled Brown/Gray Caddis All Month All Day 16 Brown or Gray Soft Hackle, 16 Brown Elk Hair Caddis Hendrickson Ephemerella Subvaria All Month All Day Female Spinner has Yellow Egg Sac 14 Hendrickson, 14 Red Quill, 14 Female Adams Yellow Stone (also Green) All Month - Morning - Late Afternoon 14-16 Mike Lawson Yellow Sally March Brown Stenonema Vicarium Mid-May All Day Sporadically 12 March Brown, Wet & Dry Light Cahill Stenonema Ithaca Afternoon - Evening 16 - 18 Light Cahill Yellow Midge Diptera Early May 20 Yellow Midge Gray Fox Stenonema Fuscum Sparse Hatch 14 Gray Fox, 14 Ginger Quill, 14 Gray Fox Variant Sulphurs Ephemerella Dorothea Early May Late Afternoon and Evening 16 - 18 Sulphurs, 16 - 18 Light Cahill Black Caddis Early May All Day 18 Black Soft Hackle, 18 Black Fluttering Caddis Cream Midge Mid-May All Day 20 - 22 Cream Midge Blue Winged Olive Baetis Mid-May Early Afternoon 20 -22 Blue Winged Olive, 20 - 22 Adams Green Drake Ephemera Guttulata Late May Evening 10 Paradrake, 8 10 White Wulff Giant Stone Fly Pteronarcys Early May Early Morning 4 - 8 Stone Fly Nymph