dobsonfly
/ˈdɒbs(ə)nflʌɪ
/noun (plural dobsonflies)
A large grey North American winged insect related to the alderflies. Its predatory aquatic larva (the hellgrammite) is often used as fishing bait.
- Family Corydalidae, order Neuroptera: several genera and species, in particular Corydalis cornutus.
- Whereas, the aquatic immature spends several years in a stream, the adult dobsonfly lives only about 7 days.
- Fishflies and dobsonflies are nocturnal, while alderflies are active during the day.
Origin
Early 20th century: of unknown origin.
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