When does the Lake Olive hatch?

April–October, typically 11:00–18:00. It starts from about 8°C, peaks around 14°C and tails off by 20°C.

How big is the Lake Olive?

Spinner stage: 6–9mm. That matches a #16–12 hook.

Mayfly · Aquatic insect

Lake Olive, Olive Shuttlecock Emerger, CDC Olive Emerger, Greenwell's Glory, typically on a #16–12 hook.

Cloeon simile

Size

6–9mm

Hook size

#16–12

Hatch window

Season April–OctoberPeak time 11:00–18:00

Water temperature

14° peak

8°20°

How fish feed on it

A modest evening fall on flat water in the margins. Worth a look when the duns have finished and fish are still working quietly.

Flies that imitate this

Lake Olive

Olive Shuttlecock Emerger

CDC Olive Emerger

Greenwell's Glory

Ecology

Rivers & stillwaterReservoirsLimestone loughsTolerates poor water

Where you'll find this

Present throughout

Identification

Cloeon simile is a species of small minnow mayfly in the family Baetidae. It is found in Europe.