When does the Hendrickson hatch?

April–May, typically 14:00–16:30. It starts from about 8°C, peaks around 12°C and tails off by 17°C.

What flies imitate the Hendrickson?

Hendrickson, Red Quill (male), Hendrickson Spinner, typically on a #14–12 hook.

How big is the Hendrickson?

Spinner stage: 8–11mm. That matches a #14–12 hook.

Mayfly · Aquatic insect

Hendrickson

Ephemerella subvaria

Size

8–11mm

Hook size

#14–12

Hatch window

Season April–MayPeak time 14:00–16:30

Water temperature

12° peak

8°17°

How fish feed on it

The Red Quill fall, in the evening after a Hendrickson afternoon. Two distinct pieces of fishing in one day, and plenty of people pack up between them.

Flies that imitate this

Hendrickson

Red Quill (male)

Hendrickson Spinner

Ecology

Rivers & stillwaterFreestone rivers

Where you'll find this

North America — EastPresent

Present throughout

Identification

Ephemerella subvaria , the red quill , is a species of spiny crawler mayfly in the family Ephemerellidae. It is found in North America.

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