Shad Flies
Like most common names, "Shad Fly" can refer to more than one taxon. They're previewed below, along with 3 specimens. For more detail click through to the scientific names.
These are often called Shad Flies.
Ephemera guttulata's size, numbers, and hatching characteristics have made it a favorite of fly fishermen since the sport first came to our waters.
It is on par with the Midwest's
Hexagenia limbata hatch for its ability to lure huge
piscivorous (Piscivorous: Anything which eats primarily fish is a piscivore.) brown trout to eat insects at the surface once a year. The special charm of the Green Drake hatch is that it often takes place during pleasant Spring afternoons. It can be challenging because the large flies are easy for trout to inspect in the daylight and they feed very selectively, especially late in the hatch.
The Green Drakes are on the decline due to environmental degradation.
These are sometimes called Shad Flies.
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.
These are sometimes called Shad Flies.
In
Caddisflies, Gary LaFontaine attributed the famous spring hatch on the Beaverkill (now known as the "Apple Caddis") to this species. After that publication, entomologists described that major hatch as a new species --
Brachycentrus appalachia.
Brachycentrus numerosus is probably still important in many locations.