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Paradise Valley — Hatch Chart

Yellowstone · Gardiner / Yellowstone National Park boundary to Carter's Bridge (south of Livingston)

Mayfly Stonefly Caddis Midge Terrestrial | darker = peak activity

Insect Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Size

BWOs (Spring)

#14-16

BWOs (Fall)

#16-22

March Browns

45°

#10-14

PMDs

58°

#14-16

Tricos

#18-22

Salmonflies

56°

#4-8

Golden Stones

#8-12

Yellow Sallies

#8-16

Caddis

54°

October Caddis

#8-10

Midges

Hoppers

#8-12

Ants

#14-18

Beetles

#14-18

Mayflies

BWOs (Spring) Mar–May · #14-16

BWOs (Fall) Sep–Oct · #16-22

March Browns Apr–May · #10-14 · 45°F

PMDs Jun–Jul · #14-16 · 58°F

Tricos Jul–Sep · #18-22

Stoneflies

Salmonflies Jun–Jul · #4-8 · 56°F

Golden Stones Jun–Jul · #8-12

Yellow Sallies Jun–Aug · #8-16

Caddis

Caddis Apr–May · 54°F

October Caddis Sep–Oct · #8-10

Midges

Midges Feb–Apr

Terrestrials

Hoppers Jul–Sep · #8-12

Ants Jul–Sep · #14-18

Beetles Jul–Sep · #14-18