Burrowing Mayfly vs New Zealand Mayfly

Side-by-side species comparison

Attribute Burrowing Mayfly New Zealand Mayfly
Scientific Name Hexagenia limbata Deleatidium lillii
Order Ephemeroptera Ephemeroptera
Family Ephemeridae Leptophlebiidae
Size 18-32 mm body 7-11 mm
Habitat Ponds & Lakes Rivers & Streams
Diet Omnivores Detritivores
Regions North America New Zealand
Conservation Least Concern Least Concern

Burrowing Mayfly

Creates massive synchronized emergences so dense they appear on weather radar. Billions emerge simultaneously from lake bottoms where nymphs burrowed for up to two years.

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Did You Know?

Mayfly emergences along the Mississippi River are so massive they show up on Doppler weather radar — billions of insects rising simultaneously look like approaching thunderstorms.

New Zealand Mayfly

The most abundant and widespread mayfly genus in New Zealand. Nymphs dominate the invertebrate fauna of stony streams throughout both islands.

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Did You Know?

It is the most commonly used bioindicator insect for water quality testing in New Zealand.