Upper Delaware river insects, Ephemerella needhami, Blue Winged Olive, insect identification fly fishing.

Ephemerella needhami
Order Ephemeroptera
Family Ephemerellidae
Genus Epeorus
Species needhami

Aquatic insect, Ephemerella needhami, Blue Winged Olive, insect identification, Delaware, river, fly fishing, identification, mayflies, caddisflies, stoneflies.
Ephemerella needhami

Pronounced - ef m er rel a - need ham i

Common Name - Blue Winged Olive

Size
Hook - 16, 18, 20
Millimeter - 7 to 8.5

Nymph
Body Color - Dark Brown almost Black
Tails - 3

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

Spinner
Body Color - Dark Tan
Wing Color - Clear
Tails - 3

   Like the smaller Serratella deficiens, Ephemerella needhami display pale yellowish legs, and Dark Dun wings. Nymphs prefer areas of the stream that support vegetation in medium to fast riffles.

   E. needhami duns range in hook size from 16 to 20, the larger size 16's are rare on the upper Delaware system.


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