Small Amber Spinner vs Pond Olive Mayfly

Side-by-side species comparison

Attribute Small Amber Spinner Pond Olive Mayfly
Scientific Name Caenis macrura Cloeon dipterum
Order Ephemeroptera Ephemeroptera
Family Caenidae Baetidae
Size 3-5 mm 6-9 mm
Habitat Ponds & Lakes Gardens
Diet Omnivores Omnivores
Regions Europe Europe, Asia
Conservation Least Concern Least Concern

Small Amber Spinner

A tiny mayfly whose amber-colored spinners fall to the water in dense clouds. Nymphs live among fine sediments in slow-flowing water.

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Did You Know?

Spinner falls can be so dense they coat the water surface like a film, triggering frenzied fish feeding.

Pond Olive Mayfly

One of the few mayflies that breeds in still water including garden ponds and rain barrels. Unusually for a mayfly, females are ovoviviparous.

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Did You Know?

This is one of the only mayflies that gives birth to live nymphs rather than laying eggs, a unique trait in the order.