Central Pennsylvania Hatches
Let's take a look at some of the most important insect hatches for central Pennsylvania

Links to Printable Hatch Chart

Mayflies

Blue-winged Olive (Baetis spp.)
Cameron, Clinton, Potter & most of the North-Central Counties All season, heaviest in May and September
Hendrickson (Ephemerella subvaria)
Cameron, Clinton, Potter & most of the North-Central April through May, when you can find them!
Sulfur Dun (Ephemerella spp.)
Centre, Juniata, Mifflin & Centre Central Counties Mid May through July
Gray Fox & March Brown (Stenonema vicarium)
Cameron, Clinton, Potter & most of the North-Central Counties Late May through June

Drake Time (Ephemera guttulata) Green Drake & Coffin Fly, Brown Drake, Yellow Drake and Slate Drake

In most North & South Central Counties  End of May through June early July
Tiny Blue-winged Olive (
Just about all Central Pennsylvania Counties July through September
Trico (Tricorythodes spp.)
Just about all Central Pennsylvania Counties Mid July through September

 

Caddis

Micro-caddis (Hydroptilidae spp.)
Just about all Central Pennsylvania Counties All season, but not heavy at any time
Grammon (Brachycentrus spp.)
Just about all Central Pennsylvania Counties May
Little Black (Chimarra spp.)
Just about all Central Pennsylvania Counties April, May
Tan Caddis
May through August Just about all Central Pennsylvania Counties
Spotted Sedge (Hydropsyche spp.)
In most North & South Central Counties June through mid September

.

Stoneflies

Yellow Sally, Little Yellow (Isoperla spp.)
All area streams May through August
Tiny Winter Black (Capniidae)
Most All area streams February in to April
Golden Stones (Acroneuria)
Most All area streams May through June

 

Miscellaneous

Midges (Chironomus spp.)
All area streams All season
Yellow Cranefly
All area streams All season
Black Ant
All area streams All season
Black Beetle
All area streams All season
Grasshopper
All area streams July through September
Cricket
All area streams May through September

 

Quick Link

History Photo Gallery
2012 MHO Supporters Flies with Tying  Instructions
MHO Tips Tying 2008 Photos
Central PA Hatches Outfitters Flies
Contact/Disclaimer Ken B Gallery
Links Central PA Rivers & Streams
Old Site 2008 17-Year Cicada photos
2009 Fly Tying George Daniel flies
Loren Williams Pat's River Specials
2009 Steelhead ISO/Slate Nymph Pattern

Home