Reindeer Nose Bot Fly vs Iron Blue Dun

Side-by-side species comparison

Attribute Reindeer Nose Bot Fly Iron Blue Dun
Scientific Name Cephenemyia trompe Baetis muticus
Order Diptera Ephemeroptera
Family Oestridae Baetidae
Size 14-18 mm 5-7 mm
Habitat Heathland Rivers & Streams
Diet Omnivores Omnivores
Regions Scandinavia, Finland, northern Russia, Siberia Europe
Conservation Least Concern Least Concern

Reindeer Nose Bot Fly

A large, hairy, bee-like fly that squirts live larvae into the nostrils of reindeer. The larvae develop in the nasal passages and throat of the host. Adults resemble bumblebees and do not feed.

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Did You Know?

This fly is one of the fastest insects in the world for its size, capable of pursuing running reindeer at speeds exceeding 40 kilometers per hour.

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.