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Hatches

Entomology you can use. Which bugs are coming off, when, where, and what to tie on — by state and month.

Hatching now — September

Maryland

  • Blue-Winged Olive dun, emerger · peak: overcast midday, spring and fall · Gunpowder Falls, Savage River · fish it with: Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
  • Midge larva, pupa, adult · peak: December through early March · Gunpowder Falls, Savage River · fish it with: Zebra Midge
  • Slate Drake (Isonychia) dun, nymph · peak: June and again in September · Gunpowder Falls, Savage River · fish it with: Pheasant Tail Nymph, Hare's Ear Nymph
  • Terrestrials (Ants, Beetles, Hoppers) adult · peak: August · Gunpowder Falls, Savage River · fish it with: Green Weenie

Pennsylvania

  • Blue-Winged Olive dun, emerger · peak: overcast midday, spring and fall · Limestone and freestone statewide · fish it with: Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
  • Slate Drake (Isonychia) dun, nymph · peak: June, late afternoon into evening · Limestone and freestone; freestone in fall · fish it with: Pheasant Tail Nymph, Hare's Ear Nymph
  • Terrestrials (Ants, Beetles, Hoppers) adult · peak: July · Statewide · fish it with: Green Weenie
  • Trico spinner · peak: August, 7-10 am · Penn's Creek, Spring Creek, Letort, Falling Spring, Yellow Breeches, Little Lehigh · fish it with: Parachute Adams

Virginia

  • Blue-Winged Olive dun, emerger · peak: overcast midday, spring and fall · Mossy Creek, Beaver Creek, all water types · fish it with: Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
  • Slate Drake (Isonychia) dun, nymph · peak: June, late afternoon into evening · Freestones, Smith River · fish it with: Pheasant Tail Nymph, Hare's Ear Nymph
  • Terrestrials (Ants, Beetles, Hoppers) adult · peak: July · Statewide; peaks on Blue Ridge freestones · fish it with: Green Weenie
  • Trico spinner · peak: August; Memorial Day through Halloween window · Mossy Creek · fish it with: Parachute Adams

West Virginia

  • Blue-Winged Olive dun, emerger · peak: overcast midday, spring and fall · Elk River, Cranberry River · fish it with: Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
  • Cinnamon Caddis adult, pupa · peak: mid-June through September on the Cranberry · Cranberry River · fish it with: Elk Hair Caddis
  • Midge larva, pupa, adult · peak: December through March · Cranberry River, Elk River · fish it with: Zebra Midge
  • Terrestrials (Ants, Beetles, Hoppers) adult · peak: August · Statewide · fish it with: Green Weenie

Maryland

Verified for 2026. Full prose chart: Maryland hatch chart.

Hatch JFMAMJJASOND Fish it with
Blue Quill peak: late April, late morning ● Parachute Adams, Pheasant Tail Nymph
Blue-Winged Olive peak: overcast midday, spring and fall ●●●●● Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
Cinnamon and Spotted Caddis peak: mid-May through August evenings ●●●● Elk Hair Caddis
Hendrickson peak: mid-April to early May ●● Parachute Adams, Pheasant Tail Nymph, Walt's Worm
Inchworm peak: June ● Green Weenie
Little Black Stonefly peak: February midday ●●● Pat's Rubber Legs
March Brown peak: May afternoons ● Parachute Adams, Hare's Ear Nymph, Pheasant Tail Nymph
Midge peak: December through early March ●●●●●●●●●●●● Zebra Midge
Pale Evening Dun peak: May evenings ● Parachute Adams, Pheasant Tail Nymph
Slate Drake (Isonychia) peak: June and again in September ●● Pheasant Tail Nymph, Hare's Ear Nymph
Sulphur peak: last 10 days of May ●●● Pheasant Tail Nymph, Frenchie Nymph, Hot Spot Pheasant Tail Nymph
Tan Caddis peak: late April afternoons ● Elk Hair Caddis, Green Weenie
Terrestrials (Ants, Beetles, Hoppers) peak: August ●●● Green Weenie
Trico peak: August mornings ●● Parachute Adams

Pennsylvania

Verified for 2026. Full prose chart: Pennsylvania hatch chart.

Hatch JFMAMJJASOND Fish it with
Blue Quill peak: March, late morning ● Parachute Adams, Pheasant Tail Nymph
Blue-Winged Olive peak: overcast midday, spring and fall ●●●●● Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
Caddis (Cinnamon and others) peak: summer evenings ●●● Elk Hair Caddis
Grannom Caddis peak: late April mornings ● Elk Hair Caddis, Green Weenie
Green Drake peak: Memorial Day weekend, plus or minus 3 days ●● Hare's Ear Nymph
Grey Fox peak: May afternoons ● Parachute Adams, Hare's Ear Nymph
Hendrickson peak: mid-April on limestone, 1-3 pm ●● Parachute Adams, Pheasant Tail Nymph, Walt's Worm
Inchworm peak: June ● Green Weenie
Light Cahill peak: evenings, late May ●● Parachute Adams, Hare's Ear Nymph
Little Black Caddis peak: April afternoons ● Elk Hair Caddis
Little Black Stonefly peak: February midday ●●● Pat's Rubber Legs
March Brown peak: May afternoons ● Parachute Adams, Hare's Ear Nymph, Pheasant Tail Nymph
Midge peak: midday in winter, heaviest on limestone ●●●● Zebra Midge
October Caddis peak: October afternoons ● Elk Hair Caddis
Quill Gordon peak: March afternoons ● Parachute Adams, Pheasant Tail Nymph, Hare's Ear Nymph
Slate Drake (Isonychia) peak: June, late afternoon into evening ●●●● Pheasant Tail Nymph, Hare's Ear Nymph
Sulphur peak: mid-May on limestone ●● Pheasant Tail Nymph, Frenchie Nymph, Hot Spot Pheasant Tail Nymph
Terrestrials (Ants, Beetles, Hoppers) peak: July ●●● Green Weenie
Trico peak: August, 7-10 am ●●● Parachute Adams

Virginia

Verified for 2026. Full prose chart: Virginia hatch chart.

Hatch JFMAMJJASOND Fish it with
Blue Quill peak: March, late morning ● Parachute Adams, Pheasant Tail Nymph
Blue-Winged Olive peak: overcast midday, spring and fall ●●●●●● Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
Caddis (Cinnamon and others) peak: summer evenings ●●● Elk Hair Caddis
Grannom Caddis peak: late April, late morning to afternoon ● Elk Hair Caddis, Green Weenie
Grey Fox peak: May afternoons ● Parachute Adams, Hare's Ear Nymph
Hendrickson peak: mid-March on Mossy Creek ●● Parachute Adams, Pheasant Tail Nymph, Walt's Worm
Inchworm peak: June ● Green Weenie
Light Cahill peak: evenings, late May ●● Parachute Adams, Hare's Ear Nymph
Little Black Stonefly peak: winter midday ●● Pat's Rubber Legs
March Brown peak: May afternoons ●● Parachute Adams, Hare's Ear Nymph, Pheasant Tail Nymph
Midge peak: midday in winter ●●●● Zebra Midge
October Caddis peak: October afternoons ● Elk Hair Caddis
Quill Gordon peak: March afternoons ● Parachute Adams, Pheasant Tail Nymph, Hare's Ear Nymph
Slate Drake (Isonychia) peak: June, late afternoon into evening ●●●● Pheasant Tail Nymph, Hare's Ear Nymph
Sulphur peak: mid-April on Mossy Creek, last 10 days of May on the Smith ●●●● Pheasant Tail Nymph, Frenchie Nymph, Hot Spot Pheasant Tail Nymph
Terrestrials (Ants, Beetles, Hoppers) peak: July ●●● Green Weenie
Trico peak: August; Memorial Day through Halloween window ●●●●●● Parachute Adams

West Virginia

Verified for 2026. Full prose chart: West Virginia hatch chart.

Hatch JFMAMJJASOND Fish it with
Blue Quill peak: March, late morning ● Parachute Adams, Pheasant Tail Nymph
Blue-Winged Olive peak: overcast midday, spring and fall ●●●●● Parachute Adams, Pheasant Tail Nymph, Frenchie Nymph, Walt's Worm
Caddis (multiple species) peak: May, afternoon-evening ● Elk Hair Caddis
Cinnamon Caddis peak: mid-June through September on the Cranberry ●●●● Elk Hair Caddis
Eastern Green Drake peak: late May into early June ●● Hare's Ear Nymph
Grey Fox peak: May afternoons ● Parachute Adams, Hare's Ear Nymph
Hendrickson peak: mid-April on the Elk, 1-3 pm ●● Parachute Adams, Pheasant Tail Nymph, Walt's Worm
Inchworm peak: June ● Green Weenie
Light Cahill peak: evenings, late May ●● Parachute Adams, Hare's Ear Nymph
Little Black Caddis peak: late morning to afternoon, April ● Elk Hair Caddis, Green Weenie
Little Black Stonefly peak: winter midday ●● Pat's Rubber Legs
Little Yellow Stonefly (Yellow Sally) peak: late afternoon, May-June ●● Pat's Rubber Legs
March Brown peak: May afternoons ●● Parachute Adams, Hare's Ear Nymph, Pheasant Tail Nymph
Midge peak: December through March ●●●●●●●●●●●● Zebra Midge
October Caddis peak: October afternoons ● Elk Hair Caddis
Quill Gordon peak: March afternoons ● Parachute Adams, Pheasant Tail Nymph, Hare's Ear Nymph
Slate Drake (Isonychia) peak: late June through August on the Cranberry ●●● Pheasant Tail Nymph, Hare's Ear Nymph
Sulphur peak: last 10 days of May on the Elk ●●● Pheasant Tail Nymph, Frenchie Nymph, Hot Spot Pheasant Tail Nymph
Terrestrials (Ants, Beetles, Hoppers) peak: August ●●● Green Weenie