Pink Lady Mayfly vs Mountain Flathead Mayfly

Side-by-side species comparison

Attribute Pink Lady Mayfly Mountain Flathead Mayfly
Scientific Name Epeorus vitreus Cinygmula ramaleyi
Order Ephemeroptera Ephemeroptera
Family Heptageniidae Heptageniidae
Size 9-12 mm 7-10 mm
Habitat Rivers & Streams Mountains
Diet Omnivores Omnivores
Regions North America North America
Conservation Least Concern Least Concern

Pink Lady Mayfly

A pale pinkish mayfly of eastern North American streams with a distinctly two-tailed nymph. Adults have translucent wings with a faint rosy tint.

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Did You Know?

The pink coloration of the adult body fades to white within minutes of death.

Mountain Flathead Mayfly

An alpine mayfly restricted to high-elevation cold streams in the Rocky Mountains. Nymphs feed on diatom films on boulder surfaces.

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Did You Know?

This species cannot survive in water temperatures above 15 degrees Celsius.