Bibio Johannis - Black Gnat
The Bibio Johannis - black gnat is a terrestrial, it is usually seen in swarms close tothe ground or over water in warm weather. If falls in large numbers on rivers and in the corners lakes, lochs and loughs.
When using a black gnat on still pools never cast directly at the trout, watch its patrol route, then cast to where you know the trout will patrol and wait - the best method for still pools with black gnats.
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