Entomology Guide

Seasonal Hatch Charts

A month-by-month guide to British Columbia's aquatic insect life — what's emerging, when it peaks, and the patterns to match it.

Early Season

April – June

pest_control

Chironomids

Midge · stillwater · peak Ice-off → June

Chironomid Bloodworm

pest_control

Mayflies

Upwing · rivers & lakes · peak Mid-May → June

pest_control

Scuds & Shrimp

Crustacean · stillwater · peak All season

Scud Fly

June – August

pest_control

Caddisflies

Sedge · rivers · peak June → July (evenings)

Elk Hair Caddis

pest_control

Stoneflies

Freestone rivers · peak June

pest_control

Damselflies

Stillwater migration · peak Late June → July

Woolly Bugger

August – October

pest_control

Terrestrials

Hoppers, ants, beetles · peak Aug → Sept

pest_control

Leeches

Stillwater · all depths · peak All season

Woolly Bugger Blob

pest_control

Baitfish & Fry

Predatory window · peak Sept → Oct

Woolly Bugger

Timing shifts with elevation, latitude and water temperature — treat these windows as a starting point, then read the water.