AB Fish Report
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Crowsnest River

Southern Alberta · 6 active this month

Crowsnest River Hatch Calendar

Last reviewed 2026-05-21

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

May hatches

No photo available

Little Black Stonefly

Capniidae

Moderatemedium
#16-206-10 mm
Air 5–18°CWater 2–8°C

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

Brown Dun

Brown Dun

Ameletus spp.

Moderatemedium
#14-1610-15 mm
Air 12–22°C (optimal 14–20°C)Water 8–14°C (optimal 9–13°C)

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

Midge

Midge

Chironomidae

Highmedium
#18-263-12 mm
Air -5–25°C (optimal 5–18°C)Water 2–20°C (optimal 4–15°C)

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

Blue-winged Olive

Blue-winged Olive

Baetis spp.

Highmedium
#18-225-7 mm
Air 8–18°C (optimal 10–16°C)Water 5–12°C (optimal 6–11°C)

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

No photo available

Grannom

Brachycentrus occidentalis

Highmedium
#14-1610-14 mm
Air 10–22°CWater 6–14°C

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

No photo available

Sow Bug

Asellus

Highmedium
#16-206-10 mm
Air 10–28°CWater 8–22°C

Tailwater below Crowsnest Lake dam. Pteronarcys californica documented (Townsend & Pritchard 1998).

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