Krystal Bugger Black - Bugger. The Black Krystal Bugger has become a very rapid success in the depths of your favourite trout lake, or the small side streams. The Crystal Bugger Black is extremely versatile fly that can be fished deep in still waters or can be fished across the current of a faster moving piece of water. This fly has been tried and proven to be a deadly addition to any anglers tackle box on rivers such as the Grand River, the Bayfield River, and the Maitland all of which are located in South-Western Ontario.