Waterlily Borer Moth vs Small Square-Gilled Mayfly

Side-by-side species comparison

Attribute Waterlily Borer Moth Small Square-Gilled Mayfly
Scientific Name Elophila gyralis Caenis luctuosa
Order Lepidoptera Ephemeroptera
Family Crambidae Caenidae
Size 18-24 mm wingspan 3-6 mm
Habitat Ponds & Lakes Ponds & Lakes
Diet Herbivores Omnivores
Regions Eastern North America Europe
Conservation Least Concern Least Concern

Waterlily Borer Moth

A small pale brown moth with wavy dark lines across its wings. Its larvae are aquatic, living underwater in cases made from fragments of waterlily leaves.

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Did You Know?

The larvae breathe underwater using modified gills and never surface until they are ready to pupate.

Small Square-Gilled Mayfly

A minute mayfly with distinctive square-shaped gills on its nymphs. Adults swarm in enormous numbers near water at twilight.

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Did You Know?

The enlarged second gill plate acts as a protective cover over the remaining delicate gills.