Hatches across the United States from March – End of May

Eastern & Mid-Western Hatches

  • Midge (Size 16-26)
  • Sulphurs (Size 12-16)
  • Blue Winged Olives (Size 18-22)
  • Quill Gordon (Size 12-14)
  • Hendrickson (Size 14-16)
  • March Brown (Size 10-12)
  • Little Black Stoneflies (Size 12-18)
  • Green Drake (Size 8-10)
  • Light Cahill (Size 14-16)

Western Hatches

  • Blue Winged Olives (Size 18-22)
  • Salmon Fly | Stonefly (Size 4-8)
  • Caddis (Size 12-18)
  • March Brown (Size 12-14)
  • Midge (Size 16-26)
  • Green Drake (Size 10-12)

Trout Fly Selections


Mayflies are the most recognized insect hatches within the fly fishing community. They are easily distinguishable with their sail-like wings, which hatch in moving and stillwater. While mayflies all have the same shape, each species has its own size and color.

Mayflies have 3 primary stages to their life cycle: nymphs, duns, spinners.

Below we have specified major mayfly hatches that are common across the United States during the spring.

Blue Winged Olives (BWO’s)

Dry Flies & Emergers

March Brown / Hendrickson / Quill Gordon

Dry Flies & Emergers

Nymphs & Wet Flies

Sulphur Mayflies

Sulphur mayflies are a common spring mayfly hatch along the east coast and New England states. They are characterized by their bright orange and neon yellow color. Some isolated sulphur species can found in a green/orange hue.

Dry Flies & Emergers

Nymphs & Wet Flies


Caddis are an extremely important food source for trout due to its terms of numbers that hatch. They come in a wide range of sizes and colors, but they all have the same tent-shape.

Caddis have a three stage life cycle: larva, pupa, and adult. Each stage looks entirely different from the last, but trout feed selectively on pupae more than any other stage.

Dry Flies & Spent Caddis

Nymphs & Wet Flies


Stoneflies are slender flying insects that trout take selectively during the spring through summer.

Stoneflies are found in two primary stages: nymph and adults. Trout feed on them throughout the year but only selectively once stonefly nymphs migrate for emergence. During this emergence, stonefly nymphs gather under rocks along the shoreline and, eventually, crawl up through the waterline and emerge into adults.

Adults stay close along the edges for mating and, often, fall in and get eaten by trout. Females carry egg sacks at the end of their abdomen and deposit them over open water.

Dry Flies

Nymphs & Wet Flies


Midges are tiny little flying insects, and are among the most important trout food form in almost every body of water (streams, rivers, lakes and ponds).

Midges hatch year-round, but are critical in the late winter through spring and again in the fall through winter.

They are found in two primary stages: pupae and adults. Midge pupae are the most important stage of the insect and are eaten constantly by trout. Midge adult are taken selectively on smooth flows.

Dry Flies

Nymph & Wet Flies


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