Velvet Ameletid Mayfly vs Iron Blue Dun

Side-by-side species comparison

Attribute Velvet Ameletid Mayfly Iron Blue Dun
Scientific Name Ameletus velox Baetis muticus
Order Ephemeroptera Ephemeroptera
Family Ameletidae Baetidae
Size 9-13 mm 5-7 mm
Habitat Rivers & Streams Rivers & Streams
Diet Omnivores Omnivores
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.

Iron Blue Dun

A small dark mayfly that hatches prolifically on cool overcast days. Nymphs are found clinging to stones in moderate to fast current.

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Did You Know?

Hatches are most prolific during rain and cold snaps, making it a favorite species for wet-weather anglers.