Fish Food: A Fly Fisher's Guide to Bugs and Bait by Cutter Ralph

Author:Cutter, Ralph
Language: eng
Format: epub
ISBN: 9780811742856
Publisher: Stackpole Books
Published: 2013-04-09T04:00:00+00:00

The exoskeleton of the dun splits at the thorax, and propelled by gases, the fully formed spinner is slowly expelled from its former self.

I will state that Epeorus emergers are hugely important to trout and largely misunderstood by trout anglers. Unlike most mayflies, which emerge on top of the water after the nymph has ascended to the surface, the Epeorus dun crawls out of its nymphal exoskeleton while the nymph is still clinging to a riverbed boulder. In some instances, the act of emergence will loosen the nymph’s grip on the riverbed, and emergence takes place within the water column.

The freshly emerged dun carries a pocket of carbon dioxide within its crumpled wings, and the buoyant gas helps the dun ascend through the water column. Once on the surface, the dun’s wings dry and harden, and the insect flies away. From an under water vantage, the ascending Epeorus dun looks like nothing more than a dark blob tangled in dangling legs and shimmering wings. A soft-hackled fly with a peacock herl body and a partridge wing is an excellent imitation, especially if it is treated with a dry powder floatant to help it retain a shiny pocket of air.

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