Thursday, March 28, 2013
Crawling out from under a stone near you!
Ecdyonurus torrentis, the large brook dun. Turn a few littoral stones over in your local spate stream and you'll like as not find a few of these handsome beasts clinging to the underside. Some anglers have observed the duns hatching in open water a la the March brown - the two flies certainly look similar to the untrained eye. However I have rarely found this emergence regime to be prevalent on my local waters, the nymphs hereabouts preferring to crawl out onto the surface of part submerged stones before making their break for freedom. As a result, large brook duns don't really figure in our plans as they are seldom available to the trout in significant numbers. They are still one of my favourites though: once I see the unmistakeable speckled brown of the big duns creeping about the margins, I know for sure that spring has arrived.