Velvet Ameletid Mayfly vs Common Mayfly

Side-by-side species comparison

Attribute Velvet Ameletid Mayfly Common Mayfly
Scientific Name Ameletus velox Ephemera danica
Order Ephemeroptera Ephemeroptera
Family Ameletidae Ephemeridae
Size 9-13 mm 15-25 mm body
Habitat Rivers & Streams Rivers & Streams
Diet Omnivores Detritivores
Regions North America Europe
Conservation Least Concern Least Concern

Velvet Ameletid Mayfly

A swift-swimming mayfly of headwater streams known for its velvety-textured nymphal cuticle. Adults emerge in early summer.

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Did You Know?

The species name velox means swift, referring to the remarkable swimming speed of the nymphs.

Common Mayfly

Adults have no functional mouths and live only 1-3 days. Massive synchronized emergences called "hatches" are among natures great spectacles. Excellent water quality indicators.

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Did You Know?

Mayflies have the shortest adult lifespan of any insect — some species live just 5 minutes as adults, long enough only to mate. They are the only insects with a winged sub-adult stage.