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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Caddisfly Species Brachycentrus appalachia (Apple Caddisflies)

This is a "wind-shield wiper" hatch -- it slows traffic on the freeway which winds through the valleys of several famous trout streams in the Catskills, which have thick hatches of the Apple Caddis in the Spring.

The common name comes from the bright apple-green color of its abdomen.

Where & when

Time of year : May

This species produces intense, reliable hatches in the Catskills sometime in between the peaks of Ephemerella subvaria (Hendricksons) and Ephemerella invaria (Sulphurs).

Special thanks to Lloyd Gonzales, author of the excellent book Fly-Fishing Pressured Water, for helping to sort out the Brachycentrus species and common names.

In 2 records from GBIF, adults of this species have been collected during May (50%) and April (50%).

In 1 record from GBIF, this species has been collected at elevation of 1614 ft.

Species Range

Specimens of the Caddisfly Species Brachycentrus appalachia

3 Adults

3 Underwater Pictures of Brachycentrus appalachia Caddisflies:

Discussions of Brachycentrus appalachia

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Caddisfly Species Brachycentrus appalachia (Apple Caddisflies)

Species Range
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