a widespread caddis fly, Brachycentrus subnubilus, the larvae of which attach their cases to vegetation under running water and are esteemed as a bait by anglers
Word origin
C18: altered from green tail
Examples of 'grannom' in a sentence
grannom
Grannom flies flickered and gauzed the air.
Times, Sunday Times (2015)
Now the grannom follows the same life course as many aquatic flies.
Times, Sunday Times (2015)
For example, why were the chub rising to the grannom, but not the trout?
Times, Sunday Times (2015)
On my local river, chub seem to love grannom.
Times, Sunday Times (2006)
The grannom, and the reaction it seems to produce in fish, can prove a head-scratcher.
Times, Sunday Times (2015)
Could it be, as some have suggested, that trout just do not like the taste of the grannom?