Upper Delaware river insects, Serratella deficiens, Blue Winged Olive, insect identification fly fishing.

Serratella deficiens
Order Ephemeroptera
Family Ephemerellidae
Genus Serratella
Species deficiens

Aquatic insect, Serratella deficiens, Blue Winged Olive, insect identification, Delaware, river, fly fishing, identification, mayflies, caddisflies, stoneflies.
Serratella deficiens

Pronounced - sir ah tell uh - dee fiss ee ens

Common Name - Blue Winged Olive

Size
Hook - 22, 24
Millimeter - 3 to 4

Nymph
Body Color - Dark Brown
Tails - 3

Dun
Body Color - Very Dark Brown
Wing Color - Very Dark Dun
Tails - 3

Spinner
Body Color - Dark Brown almost Black
Wing Color - Clear
Tails - 3

   Nymphs prefer areas of the stream that support vegetation in medium to fast riffles.

   Deficiens duns are almost identical to Ephemerella needhami except for their smaller size.


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