Aquatic insect, Ephemera guttulata, Green Drake, Delaware, river, identification, mayflies, caddisflies, stoneflies.
Ephemera guttulata
Order Ephemeroptera
Family Ephemeridae
Genus Ephemera
Species guttulata
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Aquatic insect, Ephemera guttulata, Green Drake, Delaware, river, identification, mayflies, caddisflies, stoneflies.

Ephemera guttulata

Pronounced - ef em ear uh - gut u lot uh

Common Name - Green Drake

Size
Hook - 6, 8, 10
Millimeter - 18 to 30

Nymph
Body Color - Light Brown to Amber
Tails - 3

Dun
Body Color - Cream with a Pale Greenish Tinge
Wing Color - Pale Yellowish Green with Black Marks
Tails - 3

Spinner
Body Color - White
Wing Color - Clear with Black Markings
Tails - 3

Hatch Chart

   Ephemera guttulata nymphs are burrowers and live mostly in the silt and muddy bottoms of slow water. While a few may hatch on the west branch from time to time Green Drakes are found mostly on the lower east branch and main stem preferring the warmer water temperatures that these areas offer. Ephemera guttulata begin hatching in the late evening as the water temperature cools. These large insects bring out the real hogs that feed viscously on them well into the dark. In the early evening mating swarms of spinners begin to appear high above the water, and drop closer to dip their eggs as evening progresses. Feeding on these giant spinners normally begins late in the evening, and continues well into dark. During Green Drake spinner falls huge trout can be heard smashing the waters surface well after the sun has gone down. Good Green Drake spinner falls last only three or four days.









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