Mayflies

Hatch timing / abundance

• Early mayfly hatches in spring, then recurring evening hatches through summer; trout often prefer them over chironomids when they come off .
• Callibaetis on stillwaters; Hexagenia (big) on lakes like North Star Lake evenings .
• Fernie/Elk river calendar: Western Green Drake (15–25 mm, afternoon–evening) is the first "big three"; Pale Morning Dun & Light Cahills peak July–August (late afternoon into dark) — prime in the trip window; Blue Wing Olives + Flavs in fall .

Imitated by

• Dries: Adams, Blue Wing Olive, Pale Morning Dun, Green Drake; attractors like Royal Wulff.
• Emergers/nymphs: Prince Nymph, Frenchie, Quilligon, RS2, Hare's Ear, Pheasant Tail.

Found in (waterbodies)

• Premier Lake, Rosebud Lake, Cherry Lake, North Star Lake, Goat River.

Data & occurrence sources

• Confirm and expand the Found in list and abundance with hard data — benthic-sample communities via CABIN, occurrence records via GBIF (roll up taxa per watershed) and iNaturalist, DNA-barcode IDs via BOLD. Access, licences and the FWA-segment join method are in .

Related

• Match the Hatch (Stillwater) — evening dry-fly switch.
• Chironomids (Midges) — the daytime staple before the rise.